I. D. Karachentsev؛ M. E. Sharina؛ A. E. Dolphin؛ E. K. Grebel؛ وآخرون (2002). "New distances to galaxies in the Centaurus A group". Astronomy and Astrophysics. ج. 385 ع. 1: 21–31. Bibcode:2002A&A...385...21K. DOI:10.1051/0004-6361:20020042.
I. D. Karachentsev؛ M. E. Sharina؛ A. E. Dolphin؛ E. K. Grebel؛ وآخرون (2002). "New distances to galaxies in the Centaurus A group". Astronomy and Astrophysics. ج. 385 ع. 1: 21–31. Bibcode:2002A&A...385...21K. DOI:10.1051/0004-6361:20020042.