Guder, Ferhat. “Monitoring Change of Urine Specific Gravity Levels of the Wrestlers in an Official Wrestling Tournament”. Progress in Nutrition 22, no. 1-S (May 26, 2020): 189–193. Accessed May 25, 2022. https://www.mattioli1885journals.com/index.php/progressinnutrition/article/view/9824.