Title page with the LaTeX article class

Use the titlepage class option.

\documentclass[titlepage]{article}

\usepackage{lipsum}

\begin{document}

\title{(title)}
\author{(author)}
\maketitle

\begin{abstract}
\lipsum[1]
\end{abstract}

\lipsum[1]

\end{document}

http://tex.stackexchange.com/questions/36929/how-can-i-get-a-title-page-with-the-latex-article-class 

One bibliography from multiple .bib files

The correct way to load multiple bib files is to use

\bibliography{file1,file2}

Note the lack of space between the comma and the files!

Src: http://tex.stackexchange.com/questions/84099/bibliographies-from-multiple-bib-files