Troy D. Townsend Peter Celinski Said F. Al-Sarawi Michael J. Liebelt Hybrid Parallel Counters - Domino and Threshold Logic. 275-276 2004 conf/isvlsi/2004 ISVLSI http://csdl.computer.org/comp/proceedings/isvlsi/2004/2097/00/20970275abs.htm db/conf/isvlsi/isvlsi2004.html#TownsendCAL04