BREZEZINSKI, Juliusz. Th normal decomposition of lattices and the Krull-Schmidt theorem. Mathematica Scandinavica, Berkeley, CA, United States, v. 37, p. 40–50, 1975. DOI: 10.7146/math.scand.a-11586. Disponível em: https://journals.msp.org/mscand/article/view/2087. Acesso em: 25 jul. 2026.