@inproceedings{DAC-1981-TsuiS,
	acmid         = "802332",
	author        = "Raymond Y. Tsui and Robert J. Smith II",
	booktitle     = "{Proceedings of the 18th Design Automation Conference}",
	pages         = "372--381",
	publisher     = "{ACM/IEEE}",
	title         = "{A high-density multilayer PCB router based on necessary and sufficient conditions for single row routing}",
	year          = 1981,
}