Chantaraprateep, Peerasak, Damrong Leenanuraksa, Chainarong Lohachit, and Somsawas Tuntrakul. 2019. “Project of investigation on infertile dairy cattle at Dairy Farm Promotion Organization (DFPO), Muak-Lek: 2. Preliminary report on infertile diary cattle used for induction of lactation”. Journal of Health Research 4 (2):127-34. https://he01.tci-thaijo.org/index.php/jhealthres/article/view/190408.