Longtabu はテキストをテキスト幅に縮小できません

Longtabu はテキストをテキスト幅に縮小できません

論文、その著者、および論文に関するその他の情報を記載した非常に長い表があります。私はいつもこのlongtabu表を長くしていますが、論文によっては著者が多数いるため、タブーがページの幅に収まるようにしたいのです。これは私の表で、10 本の論文に対して同じパターンになっています。

\documentclass[a4paper]{article}

\usepackage[english]{babel}
\usepackage[utf8]{inputenc}
\usepackage{amsmath}
\usepackage{graphicx}
\usepackage{tabu}
\usepackage{longtable}


\begin{document}
\begin{longtabu} to \textwidth {ll}
\endfirsthead
\endhead
\endfoot
\endlastfoot

\multicolumn{2}{l}{\textbf{\begin{tabular}[c]{@{}l@{}}A Pushing Approach for Data Synchronization in Cloud to Reduce\\ Energy Consumption in Mobile Devices\end{tabular}}} \\
Authors                                                    & S. A. L. Carvalho, R.N. Lima and A.G. Silva-Filho \cite{Carvalho:PushingApproach}                                                     \\
Platform                                                   & Android                                                                                                       \\
Logging equipment                                          & Adafruit INA219                                                                                               \\
Application type                                           & Networking application                                                                                        \\
\multicolumn{2}{l}{}                                                                                                                                                       \\
\multicolumn{2}{l}{\textbf{An empirical study of the energy consumption of android applications}}                                                                          \\
Authors                                                    & D. Li, S. Hao, J. Gui and W.G.J. Halfond \cite{Ding:EmpiricalStudy}                                                              \\
Platform                                                   & Android                                                                                                       \\
Logging equipment                                          & Monsoon power meter                                                                                           \\
Application type                                           & Networking application                                                                                        \\
\multicolumn{2}{l}{}                                                                                                                                                       \\
\multicolumn{2}{l}{\textbf{Calculating source line level energy information for android applications}}                                                                     \\
Authors                                                    & D. Li, S. Hao, W.G.J. Halfond and R. Govindan \cite{Ding:CalcSourceLine}                                                                \\
Platform                                                   & Android                                                                                                       \\
Logging equipment                                          & Monsoon power meter                                                                                           \\
Application type                                           & Networking application                                                                                        \\
\multicolumn{2}{l}{}                                                                                                                                                       \\
\multicolumn{2}{l}{\textbf{Empowering Developers to Estimate App Energy Consumption}}                                                                                      \\
Authors                                                    & R. Mittal, A. Kansal and R. Chandra \cite{Mittal:EmpoweringDevelopers}                                                                          \\
Platform                                                   & Android                                                                                                       \\
Logging equipment                                          & Monsoon power meter                                                                                           \\
Application type                                           & Networking application                                                                                        \\
\multicolumn{2}{l}{}                                                                                                                                                       \\
\multicolumn{2}{l}{\textbf{Estimating Mobile Application Energy Consumption using Program Analysis}}                                                                       \\
Authors                                                    & S. Hao, D. Li, W.G.J. Halfond and R. Govindan \cite{Ding:ProgramAnalysis}                                                                \\
Platform                                                   & Android                                                                                                       \\
Logging equipment                                          & Atom LEAP                                                                                                          \\
Application type                                           & Various mobile applications                                                                                        \\
\multicolumn{2}{l}{}                                                                                                                                                       \\
\multicolumn{2}{l}{\textbf{Measurement and Analysis of Energy Consumption on Android Smartphones}}                                                                         \\
Authors                                                    & X. Li, X. Zhang, K. Chen and S. Feng \cite{Li:MeasurementAndroid}                                                                         \\
Platform                                                   & Android                                                                                                       \\
Logging equipment                                          & Standard power meter                                                                                          \\
Application type                                           & Various Android components                                                                                        \\
\multicolumn{2}{l}{}                                                                                                                                                       \\
\multicolumn{2}{l}{\textbf{Measuring mobile phone energy consumption for 802.11 wireless networking}}                                                                      \\
Authors                                                    & A. Rice and S. Hay \cite{Rice:MeasuringWireless}                                                                                           \\
Platform                                                   & Android                                                                                                       \\
Logging equipment                                          & National Instruments PCI-MIO-16E-4                                                                            \\
Application type                                           & Networking application                                                                                        \\
\multicolumn{2}{l}{}                                                                       \\
\multicolumn{2}{l}{\textbf{Optimizing Background Email Sync on Smartphones}}                                                                                               \\
Authors                                                    & F. Xu, Y. Liu, T. Moscibroda, R. Chandra, L. Jin, Y. Zhang and Q. Li \cite{Xu:OptimizingEmailSync}                                         \\
Platform                                                   & Android                                                                                                       \\
Logging equipment                                          & Monsoon power meter                                                                                           \\
Application type                                           & Networking application                                                                                        \\
\multicolumn{2}{l}{}                                                                                                                                                       \\
\multicolumn{2}{l}{\textbf{Reducing Power Consumption in Android Applications}}                                                                                            \\
Authors                                                    & A. Singhai, J. Bose and N. Yendeti \cite{Singhai:ReducingPower}                                                                           \\
Platform                                                   & Android                                                                                                       \\
Logging equipment                                          & Monsoon power meter                                                                                           \\
Application type                                           & Graphics application                                                                                        \\
\multicolumn{2}{l}{}                                                                                                                                                       \\
\multicolumn{2}{l}{\textbf{Switching Push and Pull: An Energy Efficient Notification Approach}}                                                                            \\
Authors                                                    & D. Burgstahler, N. Richerzhagen, F. Englert, R. Hans and R. Steinmetz \cite{Burgstahler:SwitchingPushPull} \\
Platform                                                   & Android                                                                                                       \\
Logging equipment                                          & Hitex Power Scale with ACM Probe                                                                              \\
Application type                                           & Networking application      \\
\end{longtabu}

\end{document}

しかし、これをレンダリングすると、著者名の一部がテキスト幅の外側に表示されます。幅を明示的に に設定しているため、これは非常に気になります\textwidth。何が足りないのでしょうか?

編集:to \textwidthのように変更してto 0.2\textwidthも効果はなく、longtabu幅が無視されているようです。

関連情報