Suwan, Ammarin, and Naroemit Wonglikhitpanya. 2009. “Comparison of Efficacy between Manual Vacuum Aspiration and Sharp Curettage for the Treatment of Incomplete Abortion”. Thai Journal of Obstetrics and Gynaecology 17 (1). Bangkok, Thailand:43-50. https://he02.tci-thaijo.org/index.php/tjog/article/view/7674.