Piech, Piotr, Paweł Polak, Karolina Rasoul, Maciej Kozioł, Jacek Gągała, Tomasz Mazurkiewicz, Tytus Tulwin, and Robert Łuczyk. 2017. “The Comparison Between the Results of Treatment of Patients After ACL Reconstruction Using Double-Folded Semitendinosus and Gracilis Tendons and Quadruple-Folded Semitendinosus Tendon”. Journal of Education, Health and Sport 7 (6):107-19. https://apcz.umk.pl/JEHS/article/view/4505.