CEYLAN, A.; ÇALIK, F.; GERI, S.; ŞEN, M.; ECE, C.; SUMER, M. Determining the Knowledge Levels and Opinions of Athletes who is age Under-16 in Different Branches about Doping and Ergogenic Aids. Progress in Nutrition, v. 22, n. 4, p. e2020093, 11 Jan. 2021.