@article{∆wiok:1989,
  author  = "S. ∆wiok and P. Rozmej and A. Sobiczewski and Z. Patyk",
  title   = "Two fission modes of the heavy fermium isotopes",
  journal = "Nuclear Physics A",
  number  = "no 491",
  pages   = "281--289",
  year    = "1989",
}