@Article{ 
  HanMon17,
  author = { Han, Bangxian and Mondino, Andrea },
  title = { Angles between curves in metric measure spaces },
  journal = { Analysis and Geometry in Metric Spaces },
  year = { 2017 },
  volume = { 5 },
  number = { 1 },
  pages = { 47--68 },
  URL = { http://cvgmt.sns.it/paper/3309/ },
  note = { cvgmt preprint}
}