Seongmoo Heo Ronny Krashinsky Krste Asanovic Activity-Sensitive Flip-Flop and Latch Selection for Reduced Energy. 59-74 2001 conf/arvlsi/2001 ARVLSI http://doi.ieeecomputersociety.org/10.1109/ARVLSI.2001.915551 db/conf/arvlsi/arvlsi2001.html#HeoKA01