@inproceedings{DAC-1975-Valle,
	acmid         = "809094",
	author        = "Giorgio Valle",
	booktitle     = "{Proceedings of the 12th Design Automation Conference}",
	pages         = "407--413",
	publisher     = "{ACM}",
	title         = "{Relational data handling techniques in integrated circuit mask layout procedures}",
	year          = 1975,
}