Ontological Evaluation as an Automated Guide to Educational Content Augmentation. - Michael Engelhardt; Arne Hildebrand; Dagmar Lange; Thomas C. Schmidt (Berliner XML Tage, 2005)

From a Link Semantic to Semantic Links - Building Context in Educational Hypermedia - Thomas C. Schmidt; Arne Hildebrand; Michael Engelhardt; Dagmar Lange (CoRR, 2009)