@article{6522,
  author = {Bradley Hindman and T. Brown},
  title = {Acoustic power maps of solar active regions},
  year = {1998},
  journal = {The Astrophysical Journal},
  volume = {504},
  pages = {1029},
  url = {http://iopscience.iop.org/0004-637X/504/2/1029/fulltext/38217.text.html},
}