Chulwoo Kim Ki-Wook Kim Sung-Mo Kang Energy-efficient skewed static logic with dual Vt: design and synthesis. 64-70 2003 11 IEEE Trans. VLSI Syst. 1 http://doi.ieeecomputersociety.org/10.1109/TVLSI.2002.800528 db/journals/tvlsi/tvlsi11.html#KimKK03