@inproceedings{TUW-139737, author = {Weippl, Edgar}, title = {Non-repudiation and audits in e-learning}, booktitle = {Proceedings of E-Learn 2005}, year = {2005}, pages = {1785--1790}, note = {eingeladen; Vortrag: Proceedings of E-Learn, Vancouver, Canada; 2005-10-24 -- 2005-10-28} }