\documentclass{article}
\usepackage{notes2bib}
\title{notes2bib - Integrating notes into the bibliography}
\author{ShareLaTeX Templates}
\date{March 2014}
\begin{document}
\maketitle
This is a very basic example of using \texttt{notes2bib} package in order to put notes together with bibliography.
Let us begin from citation of \LaTeX\ related references \cite{latexcompanion,knuthwebsite}. Next, is a very simple example of a bibliography note \bibnote{Note for the first example}. Afterward we can referee to famous Einstein's paper \cite{einstein}. Finally, there is next note \bibnote{Note for the second example} inside text.
\bibliographystyle{unsrt}
\bibliography{sample}
\end{document}