Darrell Makarenko John Tartar A Statistical Analysis of PLA Folding. 39-51 1986 5 IEEE Trans. on CAD of Integrated Circuits and Systems 1 http://ieeexplore.ieee.org/xpls/abs_all.jsp?isnumber=28435&arnumber=1270176&count=21&index=4 db/journals/tcad/tcad5.html#MakarenkoT86