MICHELS, D. L. ., and G. A. . SOBOTTKA. “A MOBILE APPLICATION FOR ROBUST FEATURE EXTRACTION AND CULTIVAR CLASSIFICATION OF LEAVES”. Journal of Mobile Multimedia, vol. 9, no. 1-2, Sept. 2013, pp. 145-54, https://journals.riverpublishers.com/index.php/JMM/article/view/4651.