@inproceedings{DAC-1972-MahS72a,
	author        = "Lee Mah and Leon Steinberg",
	booktitle     = "{Proceedings of the Ninth Design Automation Workshop}",
	doi           = "10.1145/800153.804933",
	pages         = "80--93",
	publisher     = "{ACM}",
	title         = "{Topologic class routing for printed circuit boards}",
	year          = 1972,
}