Distance and mass of the M 104 (Sombrero) groupIgor D. Karachentsev, Lidia N. Makarova, R. Brent Tully, Gagandeep S. Anand, Luca Rizzi and Edward J. ShayaA&A, 643 (2020) A124DOI: https://doi.org/10.1051/0004-6361/202038928
