@inproceedings{DAC-1976-HellerF,
	author        = "Barry D. Heller and Robert S. Fisher",
	booktitle     = "{Proceedings of the 13th Design Automation Conference}",
	doi           = "10.1145/800146.804810",
	pages         = "168--171",
	publisher     = "{ACM}",
	title         = "{An organizational approach to routing printed circuit boards}",
	year          = 1976,
}