Bibliography
- Hadley, John, and Singmaster, David, ‘Problems to sharpen the young’, The Mathematical Gazette, 76 (1992), 102–126. https://www.jstor.org/stable/3620384.
- Singmaster, David, Adventures in recreational mathematics, Singapore: World Scientific, Vol. 1, 2021.
- Singmaster, David, Adventures in recreational mathematics, Singapore: World Scientific, Vol. 2, 2022.