Rectangles as sums of squares

Mark Walters. Rectangles as sums of squares. Discrete Mathematics, 309(9):2913-2921, 2009. [doi]

@article{Walters09,
  title = {Rectangles as sums of squares},
  author = {Mark Walters},
  year = {2009},
  doi = {10.1016/j.disc.2008.07.028},
  url = {http://dx.doi.org/10.1016/j.disc.2008.07.028},
  researchr = {https://researchr.org/publication/Walters09},
  cites = {0},
  citedby = {0},
  journal = {Discrete Mathematics},
  volume = {309},
  number = {9},
  pages = {2913-2921},
}