MILLER, John; STRANG, Gilbert. Matrix Theorems for Partial Differential and Difference Equations. Mathematica Scandinavica, Berkeley, CA, United States, v. 18, p. 113–133, 1966. DOI: 10.7146/math.scand.a-10786. Disponível em: https://journals.msp.org/mscand/article/view/2516. Acesso em: 25 jul. 2026.