Hans Georg Schaathun Tor Helleseth Separating and Intersecting Properties of BCH and Kasami Codes. 52-65 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2898&spage=52 2003 conf/ima/2003 IMA Int. Conf. db/conf/ima/ima2003.html#SchaathunH03