Oliva, F. J., and M. del R. Hernández-Pozo. “Effect of Choleric Aggression on Performance in Contact Sports: An Empirical Review”. Journal of Behavior, Health & Social Issues, vol. 1, no. 1, Aug. 2009, pp. 163-80, doi:10.22201/fesi.20070780.2009.1.1.384.