@Article{ 
  GigVio21,
  author = { Gigli, Nicola and Violo, Ivan Yuri },
  title = { Monotonicity formulas for harmonic functions in ${\rm RCD}(0,N)$ spaces },
  journal = { The Journal of Geometric Analysis },
  year = { 2021 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/4991/ },
  note = { cvgmt preprint}
}