\begin{thebibliography}{1}
  \providebibliographyfont{name}{}%
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\bibitem {botelho}
\btxnamefont {\btxlastnamefont {Botelho}, Geraldo}, \btxnamefont {Daniel
  \btxlastnamefont {Pellegrino}}\btxandcomma {} \btxandlong {}\ \btxnamefont
  {Eduardo \btxlastnamefont {Teixeira}}\btxauthorcolon\ \btxtitlefont {LaTeX -
  User’s Guide and Reference Manual}.
\newblock \btxpublisherfont {Editora SBM}, 2012.

\bibitem {goossen}
\btxnamefont {\btxlastnamefont {Goosens}, Michel}, \btxnamefont {Frank
  \btxlastnamefont {Mittelbach}}\btxandcomma {} \btxandlong {}\ \btxnamefont
  {Alexander \btxlastnamefont {Samarin}}\btxauthorcolon\ \btxtitlefont {The
  LaTeX Companion}.
\newblock \btxpublisherfont {Addison-Wesley}, 1994.

\bibitem {mittel}
\btxnamefont {\btxlastnamefont {Goosens}, Michel}, \btxnamefont {Sebastian
  \btxlastnamefont {Rahtz}}\btxandcomma {} \btxandlong {}\ \btxnamefont {Frank
  \btxlastnamefont {Mittelbach}}\btxauthorcolon\ \btxtitlefont {The LaTeX
  Graphics Companion}.
\newblock \btxpublisherfont {Addison-Wesley}, 1998.

\bibitem {leslie2000}
\btxnamefont {\btxlastnamefont {Lamport}, Leslie}\btxauthorcolon\ \btxtitlefont
  {LaTeX - User’s Guide and Reference Manual}.
\newblock \btxpublisherfont {Addison-Wesley}, 2000.

\end{thebibliography}
