Vijatrasil, Somboon, and Udom Bojarus. 1993. “The Comparative Study of the Human Sperm Hypoosmotic Swelling Test and Routine Semen Analysis”. Thai Journal of Obstetrics and Gynaecology 5 (1). Bangkok, Thailand:39-44. https://he02.tci-thaijo.org/index.php/tjog/article/view/257823.