@InCollection{Urbanowski:2009,
  author    = "K. Urbanowski",
  title     = "Khalfin's theorem and neutral mesons subsystem",
  pages     = "398--402",
  year      = "2009",
  booktitle = "Particle physics on the Eve of LHC : proceedings of the Thirteenth Lomonosov Conference on Elementary Particle Physics, ISBN: 139789812837585",
  editor    = "ed. A. I. Studenikin",
  publisher = "World Scientific Publishing",
  address   = "Singapore",
}