@inproceedings{DAC-1981-EdmondsonJ,
	acmid         = "802351",
	author        = "Tom H. Edmondson and Richard M. Jennings",
	booktitle     = "{Proceedings of the 18th Design Automation Conference}",
	pages         = "505--510",
	publisher     = "{ACM/IEEE}",
	title         = "{A low cost hierarchical system for VLSI layout and verification}",
	year          = 1981,
}