@article{Urbanowski:1993,
  author  = "K. Urbanowski",
  title   = "On the CPT-noninvariance of the effective Hamiltonian governing the time evolution in neutral kaon subspace in a CPT-invariant system",
  journal = "Physics Letters B",
  volume  = "Vol. 313",
  pages   = "374--376",
  year    = "1993",
}