@techreport{swr-hylos-07,
  author = {Thomas C. Schmidt and Matthias W{\"a}hlisch and Fritz Richter},
  title = {{hylOs} -- {Hypermedia Learning Object System}},
  type = {White Paper},
  address = {Berlin},
  institution = {link-lab},
  year = {2007},
  theme = {hp|el},
  file = {../papers/hylOs_white_paper.pdf}
}