Fixsen, Dale; Mather, John (2002). «The Spectral Results of the Far-Infrared Absolute Spectrophotometer Instrument on COBE». Astrophysical Journal. 581 (2): 817–822. Bibcode:2002ApJ...581..817F. doi:10.1086/344402.
Fixsen, Dale; Mather, John (2002). «The Spectral Results of the Far-Infrared Absolute Spectrophotometer Instrument on COBE». Astrophysical Journal. 581 (2): 817–822. Bibcode:2002ApJ...581..817F. doi:10.1086/344402.