Self-Aligned Double and Quadruple Patterning-aware grid routing with hotspots control. - Chikaaki Kodama; Hirotaka Ichikawa; Koichi Nakayama; Toshiya Kotani; Shigeki Nojima; Shoji Mimotogi; Shinji Miyamoto; Atsushi Takahashi 001 (ASP-DAC, 2013)