@Misc{ 
  KiKoMaSh13,
  author = { Kinnunen, Juha and Korte, Riikka and Marola, Niko and Shanmugalingam, Nageswari },
  title = { A characterization of BMO self-maps of a metric measure space },
  journal = { Collect. Math. },
  year = { 2015 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/2224/ },
  note = { cvgmt preprint}
}