WIRTHS, K.- joachim. An extremal problem for polynomials with a prescribed value at a given point of the real axis. MATHEMATICA SCANDINAVICA, [S. l.], v. 66, p. 130–140, 1990. DOI: 10.7146/math.scand.a-12297. Disponível em: https://www.mscand.dk/article/view/12297. Acesso em: 23 nov. 2024.