Mazur, K., D. Machaj, D. Mazur, A. Asztabska, and A. Płaczek. “The Use of Melatonin in the Treatment of Jet Lag – Clinical Review”. Journal of Education, Health and Sport, vol. 10, no. 5, May 2020, pp. 175-9, doi:10.12775/JEHS.2020.10.05.018.