@misc{indiciae000923b9ab1e,
  title = {History of earthquakes and vertical ground movement in Campi Flegrei caldera, Southern Italy: comparison of precursory events to the A.D. 1538 eruption of Monte Nuovo and of activity since 1968},
  author = {J.J. Dvorak and P. Gasparini},
  year = {1991},
  url = {https://pubs.usgs.gov/publication/70016644},
  note = {Source identifier: 70016644}
}