«Results for NGC 4501». NASA/IPAC Extragalactic Database. California Institute of Technology. Ανακτήθηκε στις 14 Νοεμβρίου 2006.
doi.org
dx.doi.org
Merloni, Andrea; Heinz, Sebastian; di Matteo, Tiziana. «A Fundamental Plane of black hole activity». Monthly Notices of the Royal Astronomical Society345 (4): 1057-1076. doi:10.1046/j.1365-2966.2003.07017.x.
Vollmer, B.; et al. (May 2008). «Pre-peak ram pressure stripping in the Virgo cluster spiral galaxy NGC 4501». Astronomy and Astrophysics483 (1): 89–106. doi:10.1051/0004-6361:20078139.