1. Existence and non-uniqueness for thep;Azorero;Comm. Partial Differential Equations,1988
2. Almost everywhere convergence of the gradients of solutions to elliptic and parabolic equations;Boccardo;Nonlinear Anal.,1992
3. On multiple solutions for the non-homogeneousp;Chabrowski;Differential Integral Equations,1995
4. Four Inequalities from PDE;Cheng;Math. Balkanica,1998
5. Y. J. Cheng, An Eigenvalue Problem for a Quasilinear Elliptic Equation, Math. Nachrichten