C. P. . Gaire, “Study on Estimation of Serum Prostate Specific Antigen Level and Prostate Volume with Trans-Abdominal Ultrasonography Finding in Benign Prostate Hypertrophy at Tertiary Care Hospital : A Cross Sectional Descriptive Study”, Birat J. Health Sci., vol. 6, no. 2, pp. 1556–1560, Nov. 2021.