@InProceedings{Urbanowski:2003,
  author      = "K. Urbanowski",
  title       = "CPT symmetry and properties of the exact and approximate effective Hamiltonians for the neutral kaon complex",
  booktitle   = "Symmetry in Nonlinear Mathematical Physics : proceedings of the fifth international conference; ISBN: 9660232268",
  address     = "Kyiv, Ukraina",
  publisher   = "Kyiv, [brak wydawcy]",
  volume      = "Mathematics and its applications, Vol. 50, part 2",
  pages       = "973--980",
  organization = "National Academy of Sciences of Ukraine Institute of mathematics",
  year        = "2003",
}