CAVALCANTI, M.; DOMINGOS CAVALCANTI, V.; SORIANO, J.; PRATES FILHO, J. Existence and asymptotic behaviour for a degenerate kirchhoff-carrier model with viscosity and nonlinear boundary conditions. Revista Matemática Complutense, v. 14, n. 1, p. 177–203, 1 ene.2001 https://doi.org/10.5209/rev_REMA.2001.v14.n1.17054.