Estel CN (Catalan Wikipedia)

Analysis of information sources in references of the Wikipedia article "Estel CN" in Catalan language version.

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Schmitt, John L. «Stars with Strong Cyanogen Absorption». Astrophysical Journal, vol. 163, 03-06-1970, pàg. 75. Bibcode: 1971ApJ...163...75S. DOI: 10.1086/150747.
Keenan, Philip C. «Spectral types and their uses». Publications of the Astronomical Society of the Pacific, vol. 99, 8-1987, pàg. 713–723. Bibcode: 1987PASP...99..713K. DOI: 10.1086/132036.
Roman, Nancy G. «The Spectra of the Bright Stars of Types F5-K5». Astrophysical Journal, vol. 116, 01-03-1952, pàg. 122. Bibcode: 1952ApJ...116..122R. DOI: 10.1086/145598.
Keenan, Philip C.; Yorka, Sandra B.; Wilson, Olin C. «Recognition and classification of strong-CN giants». Publications of the Astronomical Society of the Pacific, vol. 99, 7-1987, pàg. 629–636. Bibcode: 1987PASP...99..629K. DOI: 10.1086/132025.

Keenan, P. C.; Heck, A. «SMR stars, strong-CN stars, and R stars». Revista Mexicana de Astronomía y Astrofísica, vol. 29, 7-1994, pàg. 103–110. Bibcode: 1994RMxAA..29..103K.
Schmitt, John L. «Stars with Strong Cyanogen Absorption». Astrophysical Journal, vol. 163, 03-06-1970, pàg. 75. Bibcode: 1971ApJ...163...75S. DOI: 10.1086/150747.
Keenan, Philip C. «Spectral types and their uses». Publications of the Astronomical Society of the Pacific, vol. 99, 8-1987, pàg. 713–723. Bibcode: 1987PASP...99..713K. DOI: 10.1086/132036.
Roman, Nancy G. «The Spectra of the Bright Stars of Types F5-K5». Astrophysical Journal, vol. 116, 01-03-1952, pàg. 122. Bibcode: 1952ApJ...116..122R. DOI: 10.1086/145598.
Keenan, Philip C.; Yorka, Sandra B.; Wilson, Olin C. «Recognition and classification of strong-CN giants». Publications of the Astronomical Society of the Pacific, vol. 99, 7-1987, pàg. 629–636. Bibcode: 1987PASP...99..629K. DOI: 10.1086/132025.