Hinkle et al.; Hall, D. N. B.; Ridgway, S. T.. (1982). «Time series infrared spectroscopy of the mira variable Chi Cygni» The Astrophysical Journal 1 (252): 697–714. doi:10.1086/159596. Bibcode: 1982ApJ...252..697H..
harvard.edu
adsabs.harvard.edu
Hinkle et al.; Hall, D. N. B.; Ridgway, S. T.. (1982). «Time series infrared spectroscopy of the mira variable Chi Cygni» The Astrophysical Journal 1 (252): 697–714. doi:10.1086/159596. Bibcode: 1982ApJ...252..697H..