Sarikaya, E. ., R.-S. . Comanici, A. . Pop, I. C. . Bratu, D. . Jimbu, and I. . Bordeianu. “Variation of the Oswestry Disability Index in Patients With Lumbar Vertebral Discopathy, Surgically Treated”. American Scientific Research Journal for Engineering, Technology, and Sciences, vol. 81, no. 1, Aug. 2021, pp. 51-63, https://asrjetsjournal.org/index.php/American_Scientific_Journal/article/view/7029.