Dias, Joao Paulo, and Mario Figueira. “A Remark on the Blow-up of the Solutions of the Equation Ut+f(u)a(u)ux=h(x,u)”. Revista Matemática Complutense 9, no. 2 (January 1, 1996): 385. Accessed July 30, 2026. https://revistas.ucm.es/index.php/REMA/article/view/REMA9696230385A.