@Article{ 
  BouFraLuc14,
  author = { Bouchitté, Guy and Fragalà, Ilaria and Lucardesi, Ilaria },
  title = { Shape derivatives for minima of integral functionals },
  journal = { Math. Program., Ser. B },
  year = { 2014 },
  doi = { 10.1007/s10107-013-0712-6 },
  volume = { 148 },
  pages = { 111–142 },
  URL = { http://cvgmt.sns.it/paper/4000/ },
  note = { cvgmt preprint}
}