\begin{thebibliography}{1} \bibitem{NUMREC} W.H.Press et~al., \newblock {\em Numerical Recipes in C++}, \newblock Cambridge University Press, second edition, 2002. \bibitem{OF94} W.~E. Cleland and E.~G. Stern, \newblock {\em Signal processing considerations for liquid ionization calorimeters in a high rate environment}, \newblock Nucl. Instrum. Meth. {\bf A338} (1994) 467. \bibitem{OF77} A.~Papoulis, \newblock {\em Signal analysis}, \newblock McGraw-Hill, 1977. \end{thebibliography}