Ho, Luis C.; Filippenko, Alexei V.; Sargent, Wallace L. W. (Οκτώβριος 1997). «A Search for "Dwarf" Seyfert Nuclei. III. Spectroscopic Parameters and Properties of the Host Galaxies». Astrophysical Journal Supplement112 (2): 315–390. doi:10.1086/313041. Bibcode: 1997ApJS..112..315H
harvard.edu
adsabs.harvard.edu
Rhee, M.H.; van Albada, T.S. (Φεβρουάριος 1996). «Short WSRT HI observations of spiral galaxies.». Astronomy and Astrophysics Supplement115: 407–437. Bibcode: 1996A&AS..115..407R.
Ho, Luis C.; Filippenko, Alexei V.; Sargent, Wallace L. W. (Οκτώβριος 1997). «A Search for "Dwarf" Seyfert Nuclei. III. Spectroscopic Parameters and Properties of the Host Galaxies». Astrophysical Journal Supplement112 (2): 315–390. doi:10.1086/313041. Bibcode: 1997ApJS..112..315H