如何自定义参考？

Question

我需要定制一个参考，请看下面的文字，非常感谢大家的建议。

\documentclass[a4paper,12pt]{article}
\usepackage{cite}

\begin{document}

I cited the reference here \cite{ref1}, which gives the reference sequence 
as [1], [2], [3],..., with a title ``References''.
How to customize a reference that when cited it will assign the reference 
sequence as [A1], [A2], [A3],... with a title ``References A''. Also, the references are listed at the end of the article as [A1], [A2], [A3],...

\begin{thebibliography}{99}
\bibitem{ref1} name. 2001 Title of the reference.
\end{thebibliography}

\end{document}