CROKODIL - A Platform for Collaborative Resource-Based Learning. - Mojisola Anjorin; Christoph Rensing; Kerstin Bischoff; Christian Bogner; Lasse Lehmann; Anna Lenka Reger; Nils Faltin; Achim Steinacker; Andy Lüdemann; Renato Domínguez García (EC-TEL, 2011)