\\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[ label] {cite_ key}...\\ end{ thebibliography} widest- label: Cando se imprima o texto será tan ancho como a etiqueta producida polos comandos\\ bibitem\\ bibitem: Especifica un ítem da bibliografía