Parker، E. N. (1979). "Sunspots and the Physics of Magnetic Flux Tubes. I The General Nature of the Sunspot". The Astrophysical Journal. ج. 230: 905–913. Bibcode:1979ApJ...230..905P. DOI:10.1086/157150.
evergreen.edu
academic.evergreen.edu
Priest، E. R.؛ Forbes، T. G. (2001). "Magnetohydrodynamics"(PDF). Nature. مؤرشف من الأصل(PDF) في 2017-11-09.
harvard.edu
ui.adsabs.harvard.edu
Parker، E. N. (1979). "Sunspots and the Physics of Magnetic Flux Tubes. I The General Nature of the Sunspot". The Astrophysical Journal. ج. 230: 905–913. Bibcode:1979ApJ...230..905P. DOI:10.1086/157150.
web.archive.org
Priest، E. R.؛ Forbes، T. G. (2001). "Magnetohydrodynamics"(PDF). Nature. مؤرشف من الأصل(PDF) في 2017-11-09.