Jódar, Lucas. «An algebraic approach for solving boundary value matrix problems: existence, uniqueness and closed form solution». Revista Matemática Complutense 1, no. 1 (janeiro 1, 1988): 145. Acedido julho 30, 2026. https://revistas.ucm.es/index.php/REMA/article/view/REMA8888110145A.