 A Game Based on the Euclidean Algorithm and a Winning Strategy for It by A. J. Cole and A. J. T. Davie

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.