Messina, G., A. Messina, V. Monda, A. Ametta, F. Sessa, V. C. Francavilla, A. Daniele, M. Monda, and R. Polito. “Evaluation of Orexin-A Serum Levels in Karate Athletes Cohort”. Journal of Human Sport and Exercise, vol. 15, no. 3proc, Sept. 2020, pp. S781-S786, https://www.jhse.ua.es/article/view/2020-v15-n3-proc-orexin-a-serum-levels-karate-athletes.