@INPROCEEDINGS{hamacher01c,
    author = {N. Hamacher and J. Marrenbach},
    title = {Analytical Evaluation of Interactive Systems regarding the Ease of Use},
    booktitle = {Proceedings of HCI International 2001. Universal Access in HCI. Towards an Information Society for All},
    year = {2001},
    editor = {C. Stephanidis},
    volume = {3},
    pages = {585-589},
    address = {New Orleans},
    month = {August},
    publisher = {Lawrence Erlbaum Associates},
}