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@inproceedings{eLaw03d, author = {Ebba Thora Hvannberg and Effie Lai-Chong Law}, title = {Classification of Usability Problems (CUP) Scheme}, booktitle = {Proceedings of Ninth IFIP TC13 International Conference on Human Computer Interaction (INTERACT 2003), 1-5 Sept., Zurich, Switzerland}, month = {Sep}, year = {2003} }