@article{ChenLi2007,
  author    = {Hua Chen and Ke Li},
  title     = {The existence and regularity of multiple solutions for a class of infinitely degenerate elliptic equations},
  journal   = {Preprint / Universit{\"a}t Potsdam, Institut f{\"u}r Mathematik, Arbeitsgruppe Partiell},
  year      = {2007},
}