@article{Garczyński:1980,
  author  = "W. Garczyński and K. Urbanowski",
  title   = "Discussion of the Królikowski Rzewuski equation for projection of a state-vector onto one-dimensional subspace of Hilbert space",
  journal = "Reports on Mathematical Physics",
  volume  = "Vol. 18",
  number  = "no 1",
  pages   = "137--145",
  year    = "1980",
}