@article{Urbanowski:1993,
  author  = "K. Urbanowski and J. Skorek",
  title   = "Early time departures from the Weisskopf-Wigner decay rate",
  journal = "International Journal of Modern Physics A",
  volume  = "Vol. 8",
  number  = "no 24",
  pages   = "4355--4367",
  year    = "1993",
}