Sawattawee, Jinda, and Suchada Kornpetpanee. “The new estimation of coeffi cient of variation of ratio correlated data”. Asia-Pacific Journal of Science and Technology 17, no. 2 (April 12, 2017): 287–292. accessed April 22, 2026. https://so01.tci-thaijo.org/index.php/APST/article/view/82887.