@Misc{ 
  MorMon13a,
  author = { Monika Ewa Stypa,  and Moreno, Giovanni },
  title = { Natural boundary conditions in geometric calculus of variations },
  journal = {  },
  year = { 2013 },
  pages = {  },
  URL = { https://gecogedi.dimai.unifi.it/paper/390/ },
  note = { cvgmt preprint}
}