Using Primitive Subgroups to Do More with Fewer Bits.

Karl Rubin Alice Silverberg Using Primitive Subgroups to Do More with Fewer Bits. 18-41 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3076&spage=18 2004 conf/ants/2004 ANTS db/conf/ants/ants2004.html#RubinS04