@article{Wirsching1998b,
  author    = {{Günther J. Wirsching}},
  title     = {{Balls in Constrained Urns and Cantor-Like Sets}},
  journal   = {{Z. für Analysis u. Andwendungen}},
  year      = {{1998}},
  volume    = {{17}},
  pages     = {{979-996}},
  note      = {{MR 2000b:05007}},
}