@inproceedings{SIGIR-2003-Koster,
	author        = "Cornelis H. A. Koster",
	booktitle     = "{Proceedings of the 26th International ACM SIGIR Conference on Research and Development in Information Retrieval}",
	doi           = "10.1145/860435.860557",
	isbn          = "1-58113-646-3",
	pages         = "466",
	publisher     = "{ACM}",
	title         = "{Head/modifier pairs for everyone}",
	year          = 2003,
}