@article{1982-pritchard ,note={URL: {\tt http://cr.yp.to/\allowbreak bib/\allowbreak entries.html\#\allowbreak 1982/\allowbreak pritchard}} ,author={Paul Pritchard} ,ISSN={0001--5903} ,journal={Acta Informatica} ,MR={84g:10015} ,pages={477--485} ,title={{Explaining the wheel sieve}} ,volume={17} ,year={1982} }