Pairwuti, S., D. lan Robertson, and S. McGregor. “A Study of Squamous Cell Carcinoma of the Cervix in a Young versus an Older Thai Population”. Thai Journal of Obstetrics and Gynaecology, vol. 4, no. 1, Jan. 1992, pp. 43-50, https://he02.tci-thaijo.org/index.php/tjog/article/view/257854.