Feretti, L., Giovannini, G., Hummel, E., & Kotanyi, C. G. (August 1984). "The radio source associated with the elliptical galaxy NGC 5322". Astronomy and Astrophysics. 137 (2): 362–364. Bibcode:1984A&A...137..362F.{{cite journal}}: CS1 maint: multiple names: authors list (link)