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Aschwanden, M. J. (2001). "An evaluation of coronal heating models for Active Regions based on Yohkoh, SOHO, and TRACE observations". Astrophysical Journal. 560 (2): 1035–1044. Bibcode:2001ApJ...560.1035A. doi:10.1086/323064. S2CID121226839.
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Vaiana, G. S.; J. M. Davis; R. Giacconi; A. S. Krieger; J. K. Silk; A. F. Timothy; M. Zombeck (1973). "X-Ray Observations of Characteristic Structures and Time Variations from the Solar Corona: Preliminary Results from SKYLAB". Astrophysical Journal Letters. 185: L47–L51. Bibcode:1973ApJ...185L..47V. doi:10.1086/181318.
Aschwanden, M. J. (2001). "An evaluation of coronal heating models for Active Regions based on Yohkoh, SOHO, and TRACE observations". Astrophysical Journal. 560 (2): 1035–1044. Bibcode:2001ApJ...560.1035A. doi:10.1086/323064. S2CID121226839.