@InCollection{Leoński:1990,
  author    = "W. Leoński and R. Tanaś",
  title     = "Population trapping effect for system with double autoionizing levels",
  pages     = "669--673",
  year      = "1990",
  booktitle = "Coherence and quantum optics VI : proceedings of the Sixth Rochester Conference, ISBN: 9780306434853",
  editor    = "ed. by J. H. Eberly, L. Mandel, E. Wolf",
  publisher = "Plenum Press",
  address   = "New York",
}