@book {13821,
	title = {SIGDOC 2010 - Proceedings of the 28th ACM International Conference on Design of Communication},
	series = {Reviewing the research on distance education and e-learning},
	year = {2010},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-78650910591\&partnerID=MN8TOARS},
	author = {Mehlenbacher, B. and Holstein, K. and Gordon, B. and Khammar, K.}
}