@inproceedings{CHI-2009-Otterbacher,
	author        = "Jahna Otterbacher",
	booktitle     = "{Proceedings of the 27th ACM SIGCHI Conference on Human Factors in Computing Systems}",
	doi           = "10.1145/1518701.1518848",
	isbn          = "978-1-60558-246-7",
	pages         = "955--964",
	publisher     = "{ACM}",
	title         = "{“Helpfulness” in online communities: a measure of message quality}",
	year          = 2009,
}