@misc{indiciae08bb2c3c5f0d,
  title = {Open magnetic fields in active regions},
  author = {Svestka, Z. and Solodyna, C. V. and Howard, R. and Levine, R. H.},
  year = {1977},
  url = {https://ntrs.nasa.gov/citations/19780039116},
  note = {Source identifier: 19780039116}
}