@inproceedings{SIGIR-1982-RobertsonMC,
	author        = "Stephen E. Robertson and M. E. Maron and William S. Cooper",
	booktitle     = "{Proceedings of the Fifth Conference on Research and Development in Information Retrieval}",
	doi           = "10.1007/BFb0036342",
	pages         = "108--117",
	publisher     = "{Springer-Verlag}",
	series        = "{Lecture Notes in Computer Science}",
	title         = "{The Unified Probabilistic Model for IR}",
	volume        = 146,
	year          = 1982,
}