Check out books by Athanasios Papoulis. http://en.wikipedia.org/wiki/Athanasios_Papoulis http://en.wikipedia.org/wiki/Athanasios_Papoulis http://books.google.

Check out books by Athanasios Papoulis. http://en.wikipedia.org/wiki/Athanasios_Papoulis http://en.wikipedia.org/wiki/Athanasios_Papoulis http://books.google.co.in/books?as_auth=Athanaszaios+Papoulis&sa=X&oi=print&ct=title&cad=author-navigational&hl=en http://books.google.co.in/books?as_auth=Athanaszaios+Papouli...