GHOSHAL, S. K.; ABU MASOOD, M. Gronwall’s Vector Inequality and its Application to a Class of Non-Self-Adjoint Linear and Non-Linear Hyperbolic Partial Differential Equations. The Journal of the Indian Mathematical Society, [S. l.], v. 38, n. 1-4, p. 383–394, 1974. Disponível em: http://informaticsjournals.com/index.php/jims/article/view/16715. Acesso em: 28 apr. 2024.