Chandramouli Gopalakrishnan Srinivas Katkoori Power Optimization of Combinational Circuits by Input Transformations. 154-158 2002 conf/delta/2002 DELTA http://csdl.computer.org/comp/proceedings/delta/2002/1453/00/14530154abs.htm db/conf/delta/delta2002.html#GopalakrishnanK02