Researchr is a web site for finding, collecting, sharing, and reviewing scientific publications, for researchers by researchers.
Sign up for an account to create a profile with publication list, tag and review your related work, and share bibliographies with your co-authors.
Daniel Müller, Stefan Strohmeier. Design characteristics of virtual learning environments: state of research. Computers & Education, 57(4):2505-2516, 2011. [doi]
Abstract is missing.