AKUTOWICZ, E. J. On Extrapolating a Positive Definite Function from a Finite Interval. MATHEMATICA SCANDINAVICA, [S. l.], v. 7, p. 157–169, 1959. DOI: 10.7146/math.scand.a-10569. Disponível em: https://www.mscand.dk/article/view/10569. Acesso em: 4 may. 2024.