@Article{ 
  belferkaw03,
  author = { Belloni, Marino and Ferone, Vincenzo and Kawohl, Bernd },
  title = { Isoperimetric inequalities, Wulff shape and related questions for strongly nonlinear elliptic operators },
  journal = { ZAMP Z. Angew. Math. Phys. },
  year = { 2003 },
  volume = { 54 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/1200/ },
  note = { cvgmt preprint}
}