NIEMI, Hannu. On the linear prediction problem of certain non-stationary stochastic processes. Mathematica Scandinavica, Berkeley, CA, United States, v. 39, p. 146–160, 1976. DOI: 10.7146/math.scand.a-11652. Disponível em: https://journals.msp.org/mscand/article/view/1994. Acesso em: 25 jul. 2026.