BRUDNYI, Y.; KOZLOV, I. An algorithm of nonlinear approximation by piecewise polynomials. Математическая физика, анализ, геометрия, Харків, Україна, v. 9, n. 3, p. 311–325, 2002. Disponível em: http://mag.ilt.kharkiv.ua/index.php/mag/article/view/m09-0311e. Acesso em: 19 трав. 2024.