Jeffrey A. Newman, Stephen E. Zepf, Marc Davis, Wendy L. Freedman, Barry F. Madore, Peter B. Stetson, N. Silbermann et Randy Phelps, «A Cepheid Distance to NGC 4603 in Centaurus», The Astrophysical Journal, vol.523, no2, , p.506-520 (DOI10.1086/307764, Bibcode1999ApJ...523..506N, lire en ligne[PDF])
A.M. Garcia, «General study of group membership. II -Determination of nearby groups», Astronomy and Astrophysics Supplement Series, vol.100 #1, , p.47-90 (Bibcode1993A&AS..100...47G, lire en ligne)|format=PDF
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A.M. Garcia, «General study of group membership. II -Determination of nearby groups», Astronomy and Astrophysics Supplement Series, vol.100 #1, , p.47-90 (Bibcode1993A&AS..100...47G, lire en ligne)|format=PDF
(en) de Vaucouleurs, G., de Vaucouleurs, A., and Corwin, H.G., Second Reference Catalogue of Bright Galaxies, Austin, University of Texas Press, , 387p. (lire en ligne), page 304
Jeffrey A. Newman, Stephen E. Zepf, Marc Davis, Wendy L. Freedman, Barry F. Madore, Peter B. Stetson, N. Silbermann et Randy Phelps, «A Cepheid Distance to NGC 4603 in Centaurus», The Astrophysical Journal, vol.523, no2, , p.506-520 (DOI10.1086/307764, Bibcode1999ApJ...523..506N, lire en ligne[PDF])
Jeffrey A. Newman, Stephen E. Zepf, Marc Davis, Wendy L. Freedman, Barry F. Madore, Peter B. Stetson, N. Silbermann et Randy Phelps, «A Cepheid Distance to NGC 4603 in Centaurus», The Astrophysical Journal, vol.523, no2, , p.506-520 (DOI10.1086/307764, Bibcode1999ApJ...523..506N, lire en ligne[PDF])