Supat Attathom, Pattana Srifa, Ampaiwan Paradornuwat, and Thira Sutabutra. 1988. “Purification of Citrus Tristeza Virus”. Agriculture and Natural Resources 22 (1). Bangkok, Thailand:62-64. https://li01.tci-thaijo.org/index.php/anres/article/view/242333.