@Misc{ 
  ÁngSpe20,
  author = { Martínez, Ángel D. and Spector, Daniel },
  title = { An improvement to the John-Nirenberg inequality for functions in  critical Sobolev spaces },
  journal = {  },
  year = { 2020 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/4752/ },
  note = { cvgmt preprint}
}