@article{Światłowski:1990,
  author  = "J. Światłowski and W. Leoński",
  title   = "Population trapping for above-threshold ionization induced by a train of ultra-short laser pulses - analytical solution",
  journal = "Institute of Physics Conference Series",
  volume  = "No 114",
  number  = "sec. 2",
  pages   = "87--90",
  year    = "1990",
}