Frank Wolz Reiner Kolla Bubble Partitioning for LUT-Based Sequential Circuits. 336-345 2001 conf/fpl/2001 FPL http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2147&spage=0336 db/conf/fpl/fpl2001.html#WolzK01