Efficient routability checking for global wires in planar layouts. - Naoyuki Iso; Yasushi Kawaguchi; Tomio Hirata (ASP-DAC, 1997)

A Systolic Algorithm for Euclidean Distance Transform. - Masafumi Miyazawa; PeiFeng Zeng; Naoyuki Iso; Tomio Hirata (IEEE Trans. Pattern Anal. Mach. Intell., 2006)