@misc{indiciae9a1f24019961,
  title = {The 1994–present eruption of Popocatépetl volcano: Background, current activity, and impacts},
  author = {H. Delgado Granados and Servando De la Cruz-Reyna and Robert I. Tilling},
  year = {2008},
  doi = {10.1016/j.jvolgeores.2007.09.003},
  url = {https://pubs.usgs.gov/publication/70211108},
  note = {Source identifier: 70211108}
}