Tsalis Γεώργιος Α. “The Variation of Performance in 100-M and 400-M Freestyle Events Before, During and After the COVID-19 Era in Greek Swimming Championships”. Inquiries in Physical Education and Sport 20, no. 3 (November 15, 2022): 155–166. Accessed October 8, 2024. https://journals.lib.uth.gr/index.php/inquiries/article/view/1697.