Pakala, C. R., & Gujjula, S. (2016). 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(5), 1688–1691. https://doi.org/10.18203/2320-6012.ijrms20161250