Number | Name | Date | Kind |
---|---|---|---|
2253823 | Suteras | Aug 1941 | |
2807471 | Moore | Sep 1957 | |
2873976 | Alatorre | Feb 1959 | |
3053537 | Moss | Sep 1962 | |
3566483 | Axelrod | Mar 1971 | |
4327516 | Lubozynski | May 1982 | |
5016889 | Moss et al. | May 1991 |
Entry |
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"Mathematical Games", Scientific American, vol. 224, No. 5, May 1971, pp. 110, 111, 112, 114, 116. |