@inproceedings{oosterman2016on-the-invitation,
	author          = {Jasper Oosterman and 				Geert{-}Jan Houben},
	title           = {On the Invitation of Expert Contributors from Online Communities for Knowledge Crowdsourcing Tasks},
	booktitle       = {Proceedings of the 16th International Conference on Web Engineering ICWE 2016, Lugano, Switzerland, June 6-9, 2016},
	year            = {2016},
	group           = {WIS}
}