@inproceedings{CHI-1989-FischerN,
	author        = "Gerhard Fischer and Helga Nieper-Lemke",
	booktitle     = "{Proceedings of the Seventh ACM SIGCHI Conference on Human Factors in Computing Systems}",
	doi           = "10.1145/67449.67518",
	pages         = "357--362",
	publisher     = "{ACM}",
	title         = "{Helgon: extending the retrieval by reformulation paradigm}",
	year          = 1989,
}