Satitsuksanoa, Pattraporn, Somsak Suthuvoravut, and Anna Wongkularb. 2012. “Changes in Sperm Quality After Two Different Techniques of Sperm Preparation”. Ramathibodi Medical Journal 35 (4):309-13. https://he02.tci-thaijo.org/index.php/ramajournal/article/view/135487.