\\begin{thebibliography}{widest-label} \\bibitem[label]{cite_key}... \\end{thebibliography} widest-label: Text that, when printed, is approximately as wide as the widest item label produces by the \\bibitem commands \\bibitem: Specify a bibliography item
\\begin{thebibliography}{widest-label} \\bibitem[文献ラベル]{引用ラベル}... \\end{thebibliography} widest-label: \\bibitem コマンドによって生成される最も幅の広いラベルとほぼ同じ長さのテキスト。 \\bibitem: 参考文献を指定。