@InCollection{Ptak-Book00,
  IS =     { zkontrolovano 29 Dec 00 },
  author =   { Pt{\' a}k, Pavel },
  title =   { Observables in the Logico-Algebraic Approach },
  year =   { 2000 },
  chapter =   { 3 },
  pages =   { 67--80 },
  editor =   { Coecke, Bob and Moore, David and Wilce, Alex(ander)
                  },
  booktitle =   { Current Research in Operational Quantum Logic },
  publisher =   { Kluwer Academic publishers },
  address =   { Dordrecht, Netherlands },
  isbn =   { 0-7923-6258-6 },
  volume =   { 111 },
  series =   { Fundamental Theories of Physics },
  book_pages =   { 320 },
  keywords =   { },
  authorship =   { 100 },
  note =   { },
  project =   { VS96049, J04/98:212300013 },
}