@Article{ 
  Spe12,
  author = { Speight, Gareth },
  title = { Directional Lower Porosity },
  journal = { Real Analysis Exchange },
  year = { 2012 },
  volume = { 39 },
  number = { 1 },
  pages = { 45-56 },
  URL = { http://cvgmt.sns.it/paper/3437/ },
  note = { cvgmt preprint}
}