Properties of a Polar Coronal Hole During the Solar Minimum in 2007DOI: info:10.1088/0004-637X/725/1/774v. 725774–786
Hahn, M., Bryans, P., Landi, E., Miralles, Mari Paz, and Savin, D. W. 2010. "Properties of a Polar Coronal Hole During the Solar Minimum in 2007." The Astrophysical Journal, 725 774–786. https://doi.org/10.1088/0004-637X/725/1/774.