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@article {647, 
  author = {Heikki Hakkarainen and Juha Kinnunen and Panu Lahti},
   title = {Regularity of minimizers of the area functional in metric spaces},
    year = {2015},
 journal = {Advances in Calculus of Variations, Walter de Gruyter},
  volume = {8},
  number = {1},
   pages = {55-68},
    issn = {1864-8258}
}