@article{Zhou03-6,
  title = {Problem 11031},
  author = {Li Zhou},
  year = {2003},
  url = {http://www.jstor.org/stable/3647755},
  researchr = {https://researchr.org/publication/Zhou03-6},
  cites = {0},
  citedby = {0},
  journal = {The American Mathematical Monthly},
  volume = {110},
  number = {7},
  pages = {637},
}