@article{rafaeli2004qsia,
  title={QSIA--a Web-based environment for learning, assessing and knowledge sharing in communities},
  author={Rafaeli, Sheizaf and Barak, Miri and Dan-Gur, Yuval and Toch, Eran},
  journal={Computers \& Education},
  volume={43},
  number={3},
  pages={273--289},
  year={2004},
  publisher={Elsevier}
}