@article{SchubaWrona2001,
  author    = {Schuba, Marko and Wrona, Konrad},
  title     = {Security for Mobile Commerce Applications / Schuba, Marko ; Wrona, Konrad},
  pages     = {1 -- 8},
  year      = {2001},
  language  = {en}
}
@article{SchubaWronaZavagli2001,
  author    = {Schuba, Marko and Wrona, Konrad and Zavagli, Guido},
  title     = {Mobile Payments - State of the Art and Open Problems / Wrona, Konrad ; Schuba, Marko ; Zavagli, Guido},
  series = {Electronic commerce : second international workshop ; proceedings / WELCOM 2001, Heidelberg, Germany, November 16-17, 2001. Ludger Fiege ... (ed.)},
  journal   = {Electronic commerce : second international workshop ; proceedings / WELCOM 2001, Heidelberg, Germany, November 16-17, 2001. Ludger Fiege ... (ed.)},
  publisher = {Springer},
  address   = {Berlin},
  isbn      = {978-3-540-42878-7},
  pages     = {88 -- 100},
  year      = {2001},
  language  = {en}
}
@article{WolfFoltzKillichetal.2001,
  author    = {Wolf, Martin and Foltz, Christian and Killich, Stephan and Schmidt, Ludger},
  title     = {Task and Information Modeling for Cooperative Work / Foltz, Christian ; Killich, Stephan ; Wolf, Martin ; Schmidt, Ludger ; Luczak, Holger},
  series = {Systems, social and internationalization design aspects of human-computer interaction / ed. by Michael J. Smith, Gavriel Salvendy Vol. 2},
  journal   = {Systems, social and internationalization design aspects of human-computer interaction / ed. by Michael J. Smith, Gavriel Salvendy Vol. 2},
  publisher = {-},
  isbn      = {0-8058-3608-X},
  pages     = {172 -- 176},
  year      = {2001},
  language  = {en}
}