@article{LamoenG03,
  title = {Problem 11025},
  author = {Floor van Lamoen and Darij Grinberg},
  year = {2003},
  url = {http://www.jstor.org/stable/3647919},
  researchr = {https://researchr.org/publication/LamoenG03},
  cites = {0},
  citedby = {0},
  journal = {The American Mathematical Monthly},
  volume = {110},
  number = {6},
  pages = {543},
}