Theera Rukkwamsuk, and Sunthorn Rungruang. “Seroprevalence of Bovine Leukemia Virus (BLV) Infection in Pregnant Replacement Dairy Heifers in Saraburi Province, Thailand”. Agriculture and Natural Resources, vol. 42, no. 2, June 2008, pp. 278-81, https://li01.tci-thaijo.org/index.php/anres/article/view/244444.