@article{Pohoata09,
  title = {Problem 11450},
  author = {Cosmin Pohoata},
  year = {2009},
  url = {http://www.jstor.org/stable/40391178},
  researchr = {https://researchr.org/publication/Pohoata09},
  cites = {0},
  citedby = {0},
  journal = {The American Mathematical Monthly},
  volume = {116},
  number = {7},
  pages = {647},
}