S. T. Perera and S. E. Goonewardena, “Prevalence, knowledge and attitudes of menopausal symptoms among women aged 40-60 years and their associated factors in a semi urban area, Matara district, Sri Lanka”, Int J Reprod Contracept Obstet Gynecol, vol. 9, no. 7, pp. 2771–2777, Jun. 2020.