Tongsong, T., Wanapirak, C. and Piyamongkol, W. (1996) “Prenatal Sonographic Diagnosis of Cystic Hygroma Colli”, Thai Journal of Obstetrics and Gynaecology. Bangkok, Thailand, 8(3), pp. 189–195. available at: https://he02.tci-thaijo.org/index.php/tjog/article/view/257606 (accessed: 29 September 2026).