AKUTOWICZ, Edwin J. On an explicit formula in linear least squares prediction. MATHEMATICA SCANDINAVICA, [S. l.], v. 5, p. 261–266, 1957. DOI: 10.7146/math.scand.a-10503. Disponível em: https://tidsskrift.dk/math/article/view/10503. Acesso em: 13 aug. 2026.