@inproceedings{SIGMOD-1977-Merrett,
	author        = "T. H. Merrett",
	booktitle     = "{Proceedings of the Seventh ACM SIGMOD International Conference on Management of Data}",
	cdrom         = "SIGMOD77/P135.PDF",
	doi           = "10.1145/509404.509426",
	pages         = "135--143",
	publisher     = "{ACM}",
	title         = "{Database Cost Analysis: a Top-Down Approach}",
	year          = 1977,
}