\begin{thebibliography}{parity}

\bibitem{Knapp}
Anthony.~W Knapp.
\newblock {\em Elliptic Curves}.
\newblock Mathematical Notes, Princeton University Press.

\bibitem{SilvermanTate}
Joseph.~H. Silverman John, Tate
\newblock {\em Rational Points on Elliptic Curves}.
\newblock Springer-Verlag
\newblock Undergraduate Texts in Mathematics.

\bibitem{Sinai}
Yakov Sinai.
\newblock {\em Probability Theory An Introductory Course}.
\newblock Springer-Verlag
\newblock Translated from the Russian by D. Haughton


\bibitem{Serre}
Jean Pierre Serre
\newblock {\em A course in Arithmetic}.
\newblock Springer-Verlag,New York 1973


\end{thebibliography}