\bib{1991/petho}
\yr 1991
\isbn 3--11--012394--0
\mr 92i:11131
\by Attila Petho
\by Michael E. Pohst
\by Hugh C. Williams
\by Horst G. Zimmer
\book Computational number theory
\publ Walter de Gruyter
\publaddr Berlin
\endref
