Koji Sato, Hiroyoshi Shimoyama, Takao Nagai, Masaru Ozaki, Toshihiko Yahara. A "grid-free" channel router. In Edwin B. Hassler Jr., editor, Proceedings of the 17th Design Automation Conference, DAC '80, Minneapolis, Minnesota, USA, June 23-25, 1980. pages 22-31, ACM/IEEE, 1980. [doi]
Abstract is missing.