@inproceedings{ehsw-heose-04,
  month = {November},
  title = {{The Hypermedia eLearning Object System: Exploiting Learning Objects in a Semantic Educational Web}},
  address = {Berlin},
  author = {Michael Engelhardt and Arne Hildebrand and Thomas C. Schmidt and Mathias Werlitz},
  year = {2004},
  booktitle = {Proceedings of the 19th Codata Conference},
  theme = {hp|el},
  url = {http://www.codata.org/04conf/papers/Engelhardt-paper.pdf}
}