New theorems in approximation theory. مجلة بغداد للعلوم, Iraq, Baghdad, v. 7, n. 2, p. 1056–1060, 2010. DOI: 10.21123/bsj.2010.7.2.1056-1060. Disponível em: https://bsj.uobaghdad.edu.iq/index.php/BSJ/article/view/1072.. Acesso em: 19 2024.