NIEMI, H. Stationary vector measures and positive definite translation invariant bimeasures. Annales Fennici Mathematici, [S. l.], v. 4, n. 2, p. 209–226, 1979. DOI: 10.5186/aasfm.1978-79.0417. Disponível em: https://afm.journal.fi/article/view/134350. Acesso em: 25 nov. 2024.