@Article{ 
  brariesol09,
  author = { Braides, Andrea and Riey, Giuseppe and Solci, Margherita },
  title = { Homogenization of Penrose tilings },
  journal = { C. R. Acad. Sci. Paris },
  year = { 2009 },
  volume = { 347 },
  pages = { 697-700 },
  URL = { http://cvgmt.sns.it/paper/1007/ },
  note = { cvgmt preprint}
}