@article{1987-seysen ,note={URL: {\tt http://cr.yp.to/\allowbreak bib/\allowbreak entries.html\#\allowbreak 1987/\allowbreak seysen}} ,author={Martin Seysen} ,ISSN={0025--5718} ,journal={Mathematics of Computation} ,MR={88d:11129} ,pages={757--780} ,title={{A probabilistic factorization algorithm with quadratic forms of negative discriminant}} ,volume={48} ,year={1987} }