@Article{ 
  mbe02,
  author = { Belloni, Marino and Kawohl, Bernd },
  title = { A direct uniqueness proof for equations involving the $p$-Laplace operator },
  journal = { manuscripta mathematica },
  year = { 2002 },
  volume = { 109 },
  number = { 2 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/1028/ },
  note = { cvgmt preprint}
}