@article{Motyl:1999,
  author  = "J. Motyl",
  title   = "Viability of Set-valued Ito Equation",
  journal = "Bulletin of the Polish Academy of Sciences : Mathematics",
  volume  = "Vol. 47",
  number  = "no 1",
  pages   = "91--103",
  year    = "1999",
}