M. Ivanova, Inna, and Vanina Mihailova - Alakidi. “STRENGTHENING THE PELVIC FLOOR FOR EASING AND PREVENTING LOW BACK PAIN. 30 MINUTE HOME EXERCISE PROGRAM”. KNOWLEDGE - International Journal , vol. 61, no. 4, Dec. 2023, pp. 671-6, https://ojs.ikm.mk/index.php/kij/article/view/6472.