@Article{ 
  alb99,
  author = { Alberti, Giovanni },
  title = { Some Remarks about a Notion of Rearrangement },
  journal = { Ann. Scuola Norm. Sup. Pisa Cl. Sci. (4)  },
  year = { 1999 },
  volume = { XXIX (2000) },
  pages = { 457-472 },
  URL = { http://cvgmt.sns.it/paper/1107/ },
  note = { cvgmt preprint}
}