@article{Valdinoci00,
  title = {Problem 10808},
  author = {Enrico Valdinoci},
  year = {2000},
  url = {http://www.jstor.org/stable/2695311},
  researchr = {https://researchr.org/publication/Valdinoci00},
  cites = {0},
  citedby = {0},
  journal = {The American Mathematical Monthly},
  volume = {107},
  number = {5},
  pages = {463},
}