@Article{ 
  prakre10,
  author = { Krejcirik, David and Pratelli, Aldo },
  title = { The Cheeger constant of curved strips },
  journal = { Pacific J. Math },
  year = { 2010 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/909/ },
  note = { cvgmt preprint}
}