Sharobaro, V., S. Alimova, A. Telnova, and L. Shamanaeva. “Ultrasound Diagnosis of Age-Related Involutional changes in the lower Third of Face and Neck to determine treatment Techniques”. Pakistan Journal of Medical Sciences, Vol. 37, no. 1, Dec. 2020, doi:10.12669/pjms.37.1.3034.