G. R. Swathi, M. K. Nataraja, and S. S. Shetty, “A comparative study of hysteroscopy and transvaginal ultrasonography in diagnosis of endometrial pathology in abnormal uterine bleeding”, Int J Reprod Contracept Obstet Gynecol, vol. 9, no. 5, pp. 1772–1778, Apr. 2020.