Shabbir H. Batterywala Narendra V. Shenoy William Nicholls Hai Zhou Track assignment: a desirable intermediate step between global routing and detailed routing. 59-66 2002 conf/iccad/2002 ICCAD http://doi.acm.org/10.1145/774572.774581 db/conf/iccad/iccad2002.html#BatterywalaSNZ02