@Article{ 
  fusmagpra06,
  author = { Fusco, Nicola and Maggi, Francesco and Pratelli, Aldo },
  title = { The sharp quantitative Sobolev inequality for functions of bounded variation },
  journal = { J. Funct. Anal. },
  year = { 2006 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/1414/ },
  note = { cvgmt preprint}
}