@Article{ 
  Man18,
  author = { Mantegazza, Carlo },
  title = { Some Elementary Questions in the Calculus of Variations },
  journal = { Rend. Semin. Mat. Univ. Padova },
  year = { 2021 },
  volume = { 145 },
  pages = { 107-115 },
  URL = { http://cvgmt.sns.it/paper/3752/ },
  note = { cvgmt preprint}
}