Najeeb, Riffat, et al. “ROLE OF TRANSVAGINAL SONOGRAPHY IN ASSESSMENT OF ABNORMAL UTERINE BLEEDING IN PERIMENOPAUSAL AGE GROUP”. Journal of Ayub Medical College Abbottabad, vol. 22, no. 1, Mar. 2010, pp. 87-90, https://www.jamc.ayubmed.edu.pk/index.php/jamc/article/view/3093.