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. 49 (1): 3–18. Bibcode:2006Ap.....49....3K. doi:10.1007/s10511-006-0002-6.CS1-vedlikehold: Flere navn: forfatterliste (link)
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. 49 (1): 3–18. Bibcode:2006Ap.....49....3K. doi:10.1007/s10511-006-0002-6.CS1-vedlikehold: Flere navn: forfatterliste (link)