Farasyn, A., и R. Meeusen. Validity of the New Backache Index (bai) in Patients With Low Back Pain. Bulletin of the International Scientific Surgical Association 1, no. 3 (май 31, 2018): 20-24. просмотрено июль 10, 2026. http://www.surgjournal.ru/index.php/BISSA/article/view/105.