A Game Based on the Euclidean Algorithm and a Winning Strategy for It by A. J. Cole and A. J. T. Davie (1969, 10.2307/3612461)

By A. J. Cole, A. J. T. Davie. The Mathematical Gazette 53(386), pages 354–357, December 1969.

Publisher record and original extract: www.cambridge.org/core/journals/mathematical-gazette/article/abs/game-based-on-the-euclidean-algorithm-and-a-winning-strategy-for-it/99A7D31D926AF615AEB88F71CFAA9BB6

Introduces Euclid game. The wiki specifies its own terminal convention explicitly rather than assuming that all variants agree.