Zhai, Fengwen, Jianwu Dang, Yangping Wang, and Jing Jin. 2018. “USING MULTI-SCALE AUTO CONVOLUTION MOMENTS TO GET IMAGE AFFINE INVARIANT FEATURES”. Italian Journal of Pure and Applied Mathematics 40 (July):558-71. https://journals.uniurb.it/index.php/ijpam/article/view/6988.