@book{Rossbach.2001,
  address = {Heidelberg},
  author = {Rossbach, Gerhard},
  edition = {1. Aufl.},
  institution = {Deutscher Internet-Kongress},
  interhash = {c151eb20b081f0454a89ef00f22d0aef},
  intrahash = {ab1248487b29df2d3aa6e2f6a16c49ae},
  isbn = {3898641430},
  price = {DM 89.00, EUR 47.00 (ab 1.1.2002)},
  publisher = {dpunkt-Verl.},
  title = {Mobile Internet},
  url = {http://www.gbv.de/dms/tib-ub-hannover/334299756.pdf},
  year = 2001
}

@book{Geer.2001,
  address = {Landsberg/Lech},
  author = {Geer, Ralf and Gross, Roland},
  interhash = {ddb459f1330064904153cfa6ce54bbfe},
  intrahash = {988e07bdc8b2ab3aa14e59b6805c20ed},
  isbn = {3478249104},
  price = {DM 79.00, sfr 69.90, S 577.00},
  publisher = {Verl. Moderne Industrie},
  series = {E-business},
  title = {M-Commerce:  Geschäftsmodelle für das mobile Internet},
  year = 2001
}