Anisotropic elliptic equations with general growth in the gradient and   Hardy-type potentials
  We give existence and regularity results for solutions of some nonlinear elliptic problems. The equations we deal with are modeled on a problem which involves in its principal part an anisotropic operator, a Hardy-type potential, and a lower-order term depending on the gradient. 
Francesco Della Pietra and Nunzia Gavitone
math.AP