\bib{1988/guenther}
\yr 1988
\isbn 3--540--50251--3
\mr 90a:94002
\by Christoph G. G\"unther
\book Advances in cryptology: EUROCRYPT '88
\series Lecture Notes in Computer Science
\seriesvol 330
\publ Springer-Verlag
\publaddr Berlin
\endref