@Misc{ 
  ShiSpe13,
  author = { Shieh, Tien-Tsan and Spector, Daniel },
  title = { On a new class of fractional partial differential equations },
  journal = { Adv. Calc. Var. },
  year = { 2013 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/2292/ },
  note = { cvgmt preprint}
}