@article{SchubaWrona1999,
  author    = {Schuba, Marko and Wrona, Konrad},
  title     = {Electronic Commerce Transactions in a Wireless Environment / Schuba, Marko. ; Wrona, Konrad},
  pages     = {1 -- 9},
  year      = {1999},
  language  = {en}
}
@article{SchubaWrona2000,
  author    = {Schuba, Marko and Wrona, Konrad},
  title     = {Mobile Chip Electronic Commerce: Enabling Credit Card Payment for Mobile Devices / Schuba, Marko ; Wrona, Konrad},
  pages     = {1 -- 6},
  year      = {2000},
  language  = {en}
}
@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}
}