Analysis of Nutritional Supplements Consumption by Squash Players.
Ventura Comes, A., Sánchez-Oliver, A. J., Martínez-Sanz, J. M., & Domínguez, R. (2018).
Nutrients, 10(10), 1341. doi:10.3390/nu10101341

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6213714/