@misc{indiciae4ee3d6426f9c,
  title = {What Causes Mars' Annular Polar Vortices?},
  author = {Toigo, A. D. and Waugh, Darryn W. and Guzewich, Scott D.},
  year = {2016},
  url = {https://ntrs.nasa.gov/citations/20180004110},
  note = {Source identifier: 20180004110}
}