@inproceedings{WahlNiederwieserVollnhoferetal.2013,
  author    = {Harald Wahl and Martin Niederwieser and Sonja Vollnhofer and Shveta Sohal and Sebastian Schwarz and Alexander Mense},
  title     = {Tools for Annotating Documents in E-Learning: An Evaluation},
  booktitle = {Proceedings of the World Conference on E-Learning in Corporate, Government, Healthcare, and Higher Education},
  pages     = {21 -- 24},
  year      = {2013},
}