SHISHKOV, D. Reduction of the domains of basic elementary functions to arbitrary small intervals. Ann. Sofia Univ. Fac. Math. and Inf., [S. l.], v. 87, p. 3–32, 1995. Disponível em: https://admin.uni-sofia.bg/index.php/fmi/article/view/402. Acesso em: 15 jan. 2025.