Jerrard, Richard P.; Wetzel, John E. (2004), “Prince Rupert's rectangles”, The American Mathematical Monthly111 (1): 22–31, doi:10.2307/4145012, MR2026310.
Jerrard, Richard P.; Wetzel, John E. (2004), “Prince Rupert's rectangles”, The American Mathematical Monthly111 (1): 22–31, doi:10.2307/4145012, MR2026310.