Rahimi, Mohammad Rahman, et al. “Effects of Caffeine Ingestion on Resistance Exercise-Induced Apoptosis in Athletes: A Randomized, Double-Blind, Placebo-Controlled, Crossover Study”. Progress in Nutrition, vol. 20, no. 4, July 2018, pp. 563-9, https://doi.org/10.23751/pn.v20i4.6442.