Bikash Baral, A. B., S. . Rahman, S. M. . Islam, B. D. Happy, M. M. . Hojaifa, R. K. . Saha, and P. . Nag. “Effect of Ultrasound Therapy in the Management of Chronic Nonspecific Low Back Pain”. Journal of National Institute of Neurosciences Bangladesh, vol. 7, no. 2, Feb. 2022, pp. 122-5, doi:10.3329/jninb.v7i2.58099.