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Freedman, Wendy L.; Madore, Barry F.; Gibson, Brad K.; Ferrarese, Laura; Kelson, Daniel D.; Sakai, Shoko; Mould, Jeremy R.; Kennicutt, Jr., Robert C.; Ford, Holland C.; Graham, John A.; Huchra, John P.; Hughes, Shaun M. G.; Illingworth, Garth D.; Macri, Lucas M.; Stetson, Peter B. (2001). «Final Results from the Hubble Space Telescope Key Project to Measure the Hubble Constant». The Astrophysical Journal553 (1): 47-72. Bibcode:2001ApJ...553...47F. S2CID119097691. arXiv:astro.ph/0012376. doi:10.1086/320638.
Udalski, A.; Soszynski, I.; Szymanski, M.; Kubiak, M.; Pietrzynski, G.; Wozniak, P.; Zebrun, K. (1999). «The Optical Gravitational Lensing Experiment. Cepheids in the Magellanic Clouds. IV. Catalog of Cepheids from the Large Magellanic Cloud». Acta Astronomica49: 223. Bibcode:1999AcA....49..223U. arXiv:astro-ph/9908317.
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Freedman, Wendy L.; Madore, Barry F.; Gibson, Brad K.; Ferrarese, Laura; Kelson, Daniel D.; Sakai, Shoko; Mould, Jeremy R.; Kennicutt, Jr., Robert C.; Ford, Holland C.; Graham, John A.; Huchra, John P.; Hughes, Shaun M. G.; Illingworth, Garth D.; Macri, Lucas M.; Stetson, Peter B. (2001). «Final Results from the Hubble Space Telescope Key Project to Measure the Hubble Constant». The Astrophysical Journal553 (1): 47-72. Bibcode:2001ApJ...553...47F. S2CID119097691. arXiv:astro.ph/0012376. doi:10.1086/320638.