Engelke, Charles W. et al. (2006). “Spectral Irradiance Calibration in the Infrared. XVI. Improved Accuracy in the Infrared Spectra of the Secondary and Tertiary Standard Calibration Stars”. The Astronomical Journal132 (4): 1445-1463. Bibcode: 2006AJ....132.1445E. doi:10.1086/505865. ISSN0004-6256.
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Engelke, Charles W. et al. (2006). “Spectral Irradiance Calibration in the Infrared. XVI. Improved Accuracy in the Infrared Spectra of the Secondary and Tertiary Standard Calibration Stars”. The Astronomical Journal132 (4): 1445-1463. Bibcode: 2006AJ....132.1445E. doi:10.1086/505865. ISSN0004-6256.
Engelke, Charles W. et al. (2006). “Spectral Irradiance Calibration in the Infrared. XVI. Improved Accuracy in the Infrared Spectra of the Secondary and Tertiary Standard Calibration Stars”. The Astronomical Journal132 (4): 1445-1463. Bibcode: 2006AJ....132.1445E. doi:10.1086/505865. ISSN0004-6256.