Elliptic Curves with a Given Number of Points.

Reinier Bröker Peter Stevenhagen Elliptic Curves with a Given Number of Points. 117-131 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3076&spage=117 2004 conf/ants/2004 ANTS db/conf/ants/ants2004.html#BrokerS04