@Misc{ 
  MadSol13,
  author = { Maddalena, Francesco and Solimini, Sergio },
  title = { Synchronic and Asynchronic Descriptions of Irrigation Problems },
  journal = {  },
  year = { 2013 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/2151/ },
  note = { cvgmt preprint}
}