(en) Robert G. Deupree, Richard K. Wallace, « The core helium flash and surface abundance anomalies », The Astrophysical Journal, vol. 317, , p. 724-732 (lire en ligne)DOI10.1086/165319
(en) Laura Ferrarese, Holland C. Ford, John Huchra, Robert C. Kennicutt, Jr., Jeremy R. Mould, Shoko Sakai, Wendy L. Freedman, Peter B. Stetson, Barry F. Madore, Brad K. Gibson, John A. Graham, Shaun M. Hughes, Garth D. Illingworth, Daniel D. Kelson, Lucas Macri, Kim Sebo et N. A. Silbermann, « A Database of Cepheid Distance Moduli and Tip of the Red Giant Branch, Globular Cluster Luminosity Function, Planetary Nebula Luminosity Function, and Surface Brightness Fluctuation Data Useful for Distance Determinations », The Astrophysical Journal Supplement Series, vol. 128, no 2, , p. 431-459 (lire en ligne)DOI10.1086/313391
(en) Wendy L. Freedman, Barry F. Madore, Dylan Hatt, Taylor J. Hoyt, In Sung Jang et al., « The Carnegie-Chicago Hubble Program. VIII. An Independent Determination of the Hubble Constant Based on the Tip of the Red Giant Branch », The Astrophysical Journal, vol. 882, no 1, , p. 34- (DOI10.3847/1538-4357/ab2f73, lire en ligne, consulté le ).
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(en) Robert G. Deupree, Richard K. Wallace, « The core helium flash and surface abundance anomalies », The Astrophysical Journal, vol. 317, , p. 724-732 (lire en ligne)DOI10.1086/165319
(en) Laura Ferrarese, Holland C. Ford, John Huchra, Robert C. Kennicutt, Jr., Jeremy R. Mould, Shoko Sakai, Wendy L. Freedman, Peter B. Stetson, Barry F. Madore, Brad K. Gibson, John A. Graham, Shaun M. Hughes, Garth D. Illingworth, Daniel D. Kelson, Lucas Macri, Kim Sebo et N. A. Silbermann, « A Database of Cepheid Distance Moduli and Tip of the Red Giant Branch, Globular Cluster Luminosity Function, Planetary Nebula Luminosity Function, and Surface Brightness Fluctuation Data Useful for Distance Determinations », The Astrophysical Journal Supplement Series, vol. 128, no 2, , p. 431-459 (lire en ligne)DOI10.1086/313391
(en) Wendy L. Freedman, Barry F. Madore, Dylan Hatt, Taylor J. Hoyt, In Sung Jang et al., « The Carnegie-Chicago Hubble Program. VIII. An Independent Determination of the Hubble Constant Based on the Tip of the Red Giant Branch », The Astrophysical Journal, vol. 882, no 1, , p. 34- (DOI10.3847/1538-4357/ab2f73, lire en ligne, consulté le ).