Kovavisarach, E., and A. Rit-hiran. “Adnexal Mass with Surgical Treatment in Pregnant Women at Rajavithi Hospital: 2002-2005”. Thai Journal of Obstetrics and Gynaecology, vol. 17, no. 1, Jan. 2009, pp. 37-42, https://he02.tci-thaijo.org/index.php/tjog/article/view/7672.