Boonseng, Opas, Vilai Santisopasri, Anusart Soommart, and Doljai Paetayakratok. 1999. “Effect of Planting Seasons, Varieties and Harvesting Times on Biochemical Properties of Cassava (Manihot esculenta Crantz) Roots”. Agriculture and Natural Resources 33 (4). Bangkok, Thailand:497-506. https://li01.tci-thaijo.org/index.php/anres/article/view/240402.