Natarajan Viswanathan Min Pan Chris C. N. Chu FastPlace 3.0: A Fast Multilevel Quadratic Placement Algorithm with Placement Congestion Control. 135-140 2007 conf/aspdac/2007 ASP-DAC http://doi.ieeecomputersociety.org/10.1109/ASPDAC.2007.357975 db/conf/aspdac/aspdac2007.html#ViswanathanPC07