@article{publication-3132,
	author={Schwabe, Gerhard and Valerius, Marianne},
	issn={0340-3084},
	journal={WISU - das Wirtschaftsstudium},
	number=2,
	pages={231-327},
	publisher={Lange},
	title={Systeme f{\"u}r das kollaborative E-Learning},
	volume=30,
	year=2002,
}