Udompetaikul, V. ., K. Phetpan, and P. . Sirisomboon. “Evaluation of Informative Spectral Wavelengths for Estimating Soluble Solids Content in Sugarcane Billets”. Engineering and Applied Science Research, vol. 49, no. 4, May 2022, pp. 581-6, https://ph01.tci-thaijo.org/index.php/easr/article/view/247290.