Kiss, L. L.; Szatmáry, K.; Cadmus, R. R.; Mattei, J. A. (1999), "Multiperiodicity in semiregular variables. I. General properties", Astronomy and Astrophysics, 346: 542, arXiv:astro-ph/9904128, Bibcode:1999A&A...346..542K.
Lambert, David L.; et al. (October 1986), "The Chemical Composition of Carbon Stars. I. Carbon, Nitrogen, and Oxygen in 30 Cool Carbon Stars in the Galactic Disk", Astrophysical Journal Supplement, 62: 373, Bibcode:1986ApJS...62..373L, doi:10.1086/191145.
Percy, John R.; Wilson, Joseph B.; Henry, Gregory W. (August 2001), "Long-Term VRI Photometry of Small-Amplitude Red Variables. I. Light Curves and Periods", Publications of the Astronomical Society of the Pacific, 113 (786): 983–996, Bibcode:2001PASP..113..983P, doi:10.1086/322153, S2CID14609175.
Upgren, A. R. (February 1973), "The Parallax and Proper Motion of the Carbon Star X CANCRI", Astrophysical Journal, 179: L121, Bibcode:1973ApJ...179L.121U, doi:10.1086/181130.
Keenan, Philip C. (1993), "Revised MK Spectral Classification of the Red Carbon Stars", Publications of the Astronomical Society of the Pacific, 105: 905, Bibcode:1993PASP..105..905K, doi:10.1086/133252.
Lambert, David L.; et al. (October 1986), "The Chemical Composition of Carbon Stars. I. Carbon, Nitrogen, and Oxygen in 30 Cool Carbon Stars in the Galactic Disk", Astrophysical Journal Supplement, 62: 373, Bibcode:1986ApJS...62..373L, doi:10.1086/191145.
Percy, John R.; Wilson, Joseph B.; Henry, Gregory W. (August 2001), "Long-Term VRI Photometry of Small-Amplitude Red Variables. I. Light Curves and Periods", Publications of the Astronomical Society of the Pacific, 113 (786): 983–996, Bibcode:2001PASP..113..983P, doi:10.1086/322153, S2CID14609175.
Kiss, L. L.; Szatmáry, K.; Cadmus, R. R.; Mattei, J. A. (1999), "Multiperiodicity in semiregular variables. I. General properties", Astronomy and Astrophysics, 346: 542, arXiv:astro-ph/9904128, Bibcode:1999A&A...346..542K.
Upgren, A. R. (February 1973), "The Parallax and Proper Motion of the Carbon Star X CANCRI", Astrophysical Journal, 179: L121, Bibcode:1973ApJ...179L.121U, doi:10.1086/181130.
Keenan, Philip C. (1993), "Revised MK Spectral Classification of the Red Carbon Stars", Publications of the Astronomical Society of the Pacific, 105: 905, Bibcode:1993PASP..105..905K, doi:10.1086/133252.
Percy, John R.; Wilson, Joseph B.; Henry, Gregory W. (August 2001), "Long-Term VRI Photometry of Small-Amplitude Red Variables. I. Light Curves and Periods", Publications of the Astronomical Society of the Pacific, 113 (786): 983–996, Bibcode:2001PASP..113..983P, doi:10.1086/322153, S2CID14609175.