@inproceedings{SIGMOD-1976-CarlsonK,
	author        = "C. Robert Carlson and Robert S. Kaplan",
	booktitle     = "{Proceedings of the Sixth ACM SIGMOD International Conference on Management of Data}",
	cdrom         = "SIGMOD76/P143.PDF",
	doi           = "10.1145/509383.509403",
	pages         = "143--154",
	publisher     = "{ACM}",
	title         = "{A Generalized Access Path Model and its Application to a Relational Data Base System}",
	year          = 1976,
}