@article{EiseleHadeler1990,
  author    = {{Peter Eisele and Karl-Peter Hadeler}},
  title     = {{Game of Cards, Dynamical Systems, and a Characterization of the Floor and Ceiling Functions}},
  journal   = {{Amer. Math. Monthly}},
  year      = {{1990}},
  volume    = {{97}},
  pages     = {{466--477}},
  note      = {{MR 91h:58086}},
}