@Article{ 
  pertom05,
  author = { Percivale, Danilo and Tomarelli, Franco },
  title = { Smooth and creased equilibria for elastic-plates and beams },
  journal = { Progr. Nonlinear Differential Equations Appl., Birkhauser , Basel },
  year = { 2006 },
  volume = { 68 },
  pages = { 127-136 },
  URL = { http://cvgmt.sns.it/paper/970/ },
  note = { cvgmt preprint}
}