Niels Pinkwart Darina Dicheva Riichiro Mizoguchi SWEL'09 @ AIED'09: Ontologies and Social Semantic Web for Intelligent Educational Systems. 811 2009 AIED http://dx.doi.org/10.3233/978-1-60750-028-5-811 conf/aied/2009 db/conf/aied/aied2009.html#PinkwartDM09