@InProceedings{Matkowski:2008,
  author      = "J. Matkowski and P. Volkmann",
  title       = "A functional equation with two unkown functions",
  booktitle   = "Seminar LV : [Universitat Karlsruhe]",
  address     = "-, Niemcy",
  publisher   = "[b.m.], [brak wydawcy]",
  pages       = "[6]",
  year        = "2008",
  note        = " http://www.mathematik.uni-karlsruhe.de/user/~Seminar_LV [dostÍp:08.12.2008r.]",
}