Keenan, Philip C.; McNeil, Raymond C. (outubro de 1989). «The Perkins catalog of revised MK types for the cooler stars». Astrophysical Journal Supplement Series. 71: 245-266. Bibcode:1989ApJS...71..245K. doi:10.1086/191373
Kallinger, T.; et al. (abril de 2019). «Stellar masses from granulation and oscillations of 23 bright red giants observed by BRITE-Constellation». Astronomy & Astrophysics. 624: A35, 17 pp. Bibcode:2019A&A...624A..35K. doi:10.1051/0004-6361/201834514
Jofré, E.; et al. (fevereiro de 2015). «Stellar parameters and chemical abundances of 223 evolved stars with and without planets». Astronomy & Astrophysics. 574: A50, 46 pp. Bibcode:2015A&A...574A..50J. doi:10.1051/0004-6361/201424474
Keenan, Philip C.; McNeil, Raymond C. (outubro de 1989). «The Perkins catalog of revised MK types for the cooler stars». Astrophysical Journal Supplement Series. 71: 245-266. Bibcode:1989ApJS...71..245K. doi:10.1086/191373
Johnson, H. L.; et al. (1966). «UBVRIJKL photometry of the bright stars». Communications of the Lunar and Planetary Laboratory. 4 (99). Bibcode:1966CoLPL...4...99J
Kallinger, T.; et al. (abril de 2019). «Stellar masses from granulation and oscillations of 23 bright red giants observed by BRITE-Constellation». Astronomy & Astrophysics. 624: A35, 17 pp. Bibcode:2019A&A...624A..35K. doi:10.1051/0004-6361/201834514
Jofré, E.; et al. (fevereiro de 2015). «Stellar parameters and chemical abundances of 223 evolved stars with and without planets». Astronomy & Astrophysics. 574: A50, 46 pp. Bibcode:2015A&A...574A..50J. doi:10.1051/0004-6361/201424474