Tursi, D., S. Napolitano, P. A. Di Tore, and G. Raiola. “Arm Stroke: A Comparative Analysis Between Competitive Swimming and Water Polo Athletes”. Journal of Human Sport and Exercise, vol. 8, no. 2proc, July 2013, pp. S314-S322, doi:10.4100/jhse.2012.8.Proc2.34.