Pakala, Chandrasekhar Rao, and Sudha Gujjula. “Age at Menarche and Menstrual Complications: A Cross Cultural Study Among Hostel Students in Tirupati, Chittoor District, Andhra Pradesh, India”. International Journal of Research in Medical Sciences 4, no. 5 (December 30, 2016): 1688–1691. Accessed October 12, 2025. https://www.msjonline.org/index.php/ijrms/article/view/782.