Karachentsev, I. D.؛ Kashibadze, O. G. (2006). "Masses of the local group and of the M81 group estimated from distortions in the local velocity field". Astrophysics. ج. 49 ع. 1: 3–18. Bibcode:2006Ap.....49....3K. DOI:10.1007/s10511-006-0002-6.
Dunlop James (1828). "A Catalogue of Nebulae and Clusters of Stars in the Southern Hemisphere observed in New South Wales". Philosophical Transactions of the Royal Society. ج. 118: 113–151. Bibcode:1828RSPT..118..113D. DOI:10.1098/rstl.1828.0010. JSTOR:107841.
Lauberts A.; Valentijn E. A. (1989), The surface photometry catalogue of the ESO-Uppsala galaxies (بالإنجليزية), vol. -1, p. 0, Bibcode:1989ESOLV.C......0L, QID:Q66381073
Karachentsev, I. D.؛ Kashibadze, O. G. (2006). "Masses of the local group and of the M81 group estimated from distortions in the local velocity field". Astrophysics. ج. 49 ع. 1: 3–18. Bibcode:2006Ap.....49....3K. DOI:10.1007/s10511-006-0002-6.
Dunlop James (1828). "A Catalogue of Nebulae and Clusters of Stars in the Southern Hemisphere observed in New South Wales". Philosophical Transactions of the Royal Society. ج. 118: 113–151. Bibcode:1828RSPT..118..113D. DOI:10.1098/rstl.1828.0010. JSTOR:107841.
Dunlop James (1828). "A Catalogue of Nebulae and Clusters of Stars in the Southern Hemisphere observed in New South Wales". Philosophical Transactions of the Royal Society. ج. 118: 113–151. Bibcode:1828RSPT..118..113D. DOI:10.1098/rstl.1828.0010. JSTOR:107841.
Lauberts A.; Valentijn E. A. (1989), The surface photometry catalogue of the ESO-Uppsala galaxies (بالإنجليزية), vol. -1, p. 0, Bibcode:1989ESOLV.C......0L, QID:Q66381073