@inproceedings{1972-williams ,note={URL: {\tt http://cr.yp.to/\allowbreak bib/\allowbreak entries.html\#\allowbreak 1972/\allowbreak williams}} ,author={Hugh C. Williams} ,crossref={1972-hoffman} ,MR={51:320} ,pages={451--462} ,title={{Some algorithms for solving $x^q\equiv N\pmod p$}} ,year={1972} }