Ryabov, G.G., and V.A. Serov. “The Mapping of Integer Sets and Euclidean Approximations”. Numerical Methods and Programming (Vychislitel’nye Metody i Programmirovanie) 8, no. 11 (January 9, 2007): 10–19. Accessed April 29, 2024. https://en.num-meth.ru/index.php/journal/article/view/241.