@article{Kisielewicz:1977,
  author  = "M. Kisielewicz",
  title   = "On the non-convergence of successive approximations in the Darboux problem for the equation z"xy=f(x,y,z)",
  journal = "Colloquium Mathematicum",
  volume  = "Vol. 38",
  pages   = "103--110",
  year    = "1977",
}