@Misc{ 
  RibZap14,
  author = { Ribeiro, Ana Margarida and Zappale, Elvira },
  title = { Existence of minimizers for non-level convex supremal functionals },
  journal = { SIAM Journal on Control and Optimization },
  year = { 2014 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/2481/ },
  note = { cvgmt preprint}
}