Jie Chen, Na Yao, Hengyou Wang, Xiao Zhang, Haifang Lv. 2021. “Determination of Sugar Content in Apple by Hyperspectrum With Interval Sampling Algorithm for Sample Subset and Ga-Pls Model”. CONVERTER 2021 (8):309 -18. http://converter-magazine.info/index.php/converter/article/view/640.