P. V. GADAGKAR. Initial Value Linear Evolutions Equations Involving Elliptic Operator on the Plane. International Journal of Mathematics And its Applications, [S. l.], v. 5, n. 3 - A, p. 9–12, 2017. Disponível em: https://ijmaa.in/index.php/ijmaa/article/view/839. Acesso em: 3 jul. 2024.