\bib{1991/ferre}
\yr 1991
\by Ricardo Ferr\'e
\paper Discrete convolution with modulo operations
\jour Applied Mathematics Letters
\issn 0893--9659
\vol 4
\pages 13--17
\url http://cr.yp.to/\allowbreak bib/\allowbreak entries.html#\allowbreak 1991/\allowbreak ferre
\endref