Pantelimon Stanica Subhamoy Maitra John A. Clark Results on Rotation Symmetric Bent and Correlation Immune Boolean Functions. 161-177 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3017&spage=161 2004 conf/fse/2004 FSE db/conf/fse/fse2004.html#StanicaMC04