@Article{ 
  PetSar19,
  author = { Petronio, Carlo and Sarti, Filippo },
  title = { Counting surface branched covers },
  journal = { Studia Scientiarum Mathematica Hungarica },
  year = { 2019 },
  doi = { https://doi.org/10.1556/012.2019.56.3.1431 },
  volume = { 56 },
  number = { 3 },
  pages = { 14 },
  URL = { https://gecogedi.dimai.unifi.it/paper/329/ },
  note = { cvgmt preprint}
}