Spencer K, Brady H. Examining the effects of a variation to the ruck law in Rugby Union. J. Hum. Sport Exerc. [Internet]. 2015 Dec. 1 [cited 2024 Apr. 16];10(2):550-62. Available from: https://www.jhse.ua.es/article/view/2015-v10-n2-examining-the-effects-of-a-variation-to-the-ruck-law