@inproceedings{DAC-1978-PreasG,
	acmid         = "803089",
	author        = "Bryan Preas and Charles W. Gwyn",
	booktitle     = "{Proceedings of the 15th Design Automation Conference}",
	pages         = "206--212",
	publisher     = "{ACM}",
	title         = "{Methods for hierarchical automatic layout of custom LSI circuit masks}",
	year          = 1978,
}