Volianitis Σ., Bakas Γ., Flouris Α. Δ., and Famisis Κ. “Association Between Speed, Repeated Sprint Ability and Aerobic Endurance Parameters in Professional Greek Soccer Players”. Inquiries in Physical Education and Sport, vol. 17, no. 2, July 2019, pp. 90-96, https://journals.lib.uth.gr/index.php/inquiries/article/view/1527.