ASPLUND, E. Inverses of Matrices $\{a_{ij}\}$ which Satisfy $a_{ij} = 0$ for $j > i+p$. MATHEMATICA SCANDINAVICA, [S. l.], v. 7, p. 57–60, 1959. DOI: 10.7146/math.scand.a-10561. Disponível em: https://www.mscand.dk/article/view/10561. Acesso em: 2 may. 2024.