F. Otto, L(1)-CONTRACTION AND UNIQUENESS FOR QUASI-LINEAR ELLIPTIC-PARABOLIC EQUATIONS, Comptes rendus de l'Academie des sciences. Serie 1, Mathematique, 321(8), 1995, pp. 1005-1010
We prove L(1)-contraction principle and uniqueness of solutions for qu
asilinear elliptic-parabolic equations. The notion of weak solution co
nsidered is that of ''finite energy'' (see [1]).