@article{6217,
  author = {S. Tobias},
  title = {The solar cycle: Parity interactions and amplitude modulation},
  year = {1997},
  journal = {Astronomy and Astrophysics},
  volume = {322},
  pages = {1007-1017},
  url = {http://adsabs.harvard.edu/full/1997A\%26A...322.1007T},
  note = {JILA Pub. 5801},
}