\documentclass[]{bolmat5}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{amsmath}
\usepackage{tikz-cd}
\usepackage{float}
\usepackage{tikz}
\usetikzlibrary{trees}
\usetikzlibrary{decorations.pathmorphing}
\usetikzlibrary{decorations.pathreplacing}
\usetikzlibrary{decorations.markings}
\usetikzlibrary{decorations.shapes}
\usepackage{verbatim}
\labeldocument[firstpage = 1, volume = 0, number = 0, month = 00, year = 1900, day = 00, monthreceived = 0, yearreceived = 1900, monthaccepted = 0, yearaccepted = 1900]
\begin{document}
\title[maintitle = {Title in English},
othertitle = {Title in Spanish - T\'itulo en espa\~nol},
shorttitle = {}
]
\begin{authors}[] % Campo opcional para colocar el encabezado de autores.
\author[firstname = {First},
surname = {Author},
institutionnumber = {1},
email = {fauthor@university1.edu},
]
\author[firstname = {Second},
surname = {Author},
institutionnumber = {2},
email = {sauthor@university2.edu},
]
\end{authors}
\begin{affiliations}
\affiliation[
department = {Department or School},
institution = {University 1},
city = {City},
country = {Country}
]
\affiliation[
department = {Department or School},
institution = {University 2},
city = {City},
country = {Country}
]
\end{affiliations}
\begin{mainabstract} Abstract in English.
\keywords{Keywords in English}
\end{mainabstract}
\begin{otherabstract} Abstract in Spanish - Resumen en espa\~nol.
\keywords{Keywords in Spanish - palabras clave en espa\~nol}
\end{otherabstract}
\msc{Mathematics Subject Classification According to AMS.}
\section{First section}
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\bibliography{BMBibTeX}
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\end{document}
