Müller-Sánchez, F.; Prieto, M. A.; Mezcua, M.; Davies, R. I.; Malkan, M. A.; Elitzur, M. (20 January 2013). "The Central Molecular Gas Structure in Liners with Low-Luminosity Active Galactic Nuclei: Evidence for Gradual Disappearance of the Torus". The Astrophysical Journal. 763 (1): L1. arXiv:1212.1162. Bibcode:2013ApJ...763L...1M. doi:10.1088/2041-8205/763/1/L1.
Ho, Luis C.; Filippenko, Alexei V.; Sargent, Wallace L. W. (October 1997). "A Search for Dwarf Seyfert Nuclei. III. Spectroscopic Parameters and Properties of the Host Galaxies". The Astrophysical Journal Supplement Series. 112 (2): 315–390. arXiv:astro-ph/9704107. Bibcode:1997ApJS..112..315H. doi:10.1086/313041.
Walsh, Jonelle L.; Barth, Aaron J.; Ho, Luis C.; Filippenko, Alexei V.; Rix, Hans-Walter; Shields, Joseph C.; Sarzi, Marc; Sargent, Wallace L. W. (1 October 2008). "HUBBLE SPACE TELESCOPE SPECTROSCOPIC OBSERVATIONS OF THE NARROW-LINE REGION IN NEARBY LOW-LUMINOSITY ACTIVE GALACTIC NUCLEI". The Astronomical Journal. 136 (4): 1677–1702. arXiv:0808.0914. Bibcode:2008AJ....136.1677W. doi:10.1088/0004-6256/136/4/1677.
Müller-Sánchez, F.; Prieto, M. A.; Mezcua, M.; Davies, R. I.; Malkan, M. A.; Elitzur, M. (20 January 2013). "The Central Molecular Gas Structure in Liners with Low-Luminosity Active Galactic Nuclei: Evidence for Gradual Disappearance of the Torus". The Astrophysical Journal. 763 (1): L1. arXiv:1212.1162. Bibcode:2013ApJ...763L...1M. doi:10.1088/2041-8205/763/1/L1.
Ho, Luis C.; Filippenko, Alexei V.; Sargent, Wallace L. W. (October 1997). "A Search for Dwarf Seyfert Nuclei. III. Spectroscopic Parameters and Properties of the Host Galaxies". The Astrophysical Journal Supplement Series. 112 (2): 315–390. arXiv:astro-ph/9704107. Bibcode:1997ApJS..112..315H. doi:10.1086/313041.
Walsh, Jonelle L.; Barth, Aaron J.; Ho, Luis C.; Filippenko, Alexei V.; Rix, Hans-Walter; Shields, Joseph C.; Sarzi, Marc; Sargent, Wallace L. W. (1 October 2008). "HUBBLE SPACE TELESCOPE SPECTROSCOPIC OBSERVATIONS OF THE NARROW-LINE REGION IN NEARBY LOW-LUMINOSITY ACTIVE GALACTIC NUCLEI". The Astronomical Journal. 136 (4): 1677–1702. arXiv:0808.0914. Bibcode:2008AJ....136.1677W. doi:10.1088/0004-6256/136/4/1677.
Müller-Sánchez, F.; Prieto, M. A.; Mezcua, M.; Davies, R. I.; Malkan, M. A.; Elitzur, M. (20 January 2013). "The Central Molecular Gas Structure in Liners with Low-Luminosity Active Galactic Nuclei: Evidence for Gradual Disappearance of the Torus". The Astrophysical Journal. 763 (1): L1. arXiv:1212.1162. Bibcode:2013ApJ...763L...1M. doi:10.1088/2041-8205/763/1/L1.
Ho, Luis C.; Filippenko, Alexei V.; Sargent, Wallace L. W. (October 1997). "A Search for Dwarf Seyfert Nuclei. III. Spectroscopic Parameters and Properties of the Host Galaxies". The Astrophysical Journal Supplement Series. 112 (2): 315–390. arXiv:astro-ph/9704107. Bibcode:1997ApJS..112..315H. doi:10.1086/313041.
Walsh, Jonelle L.; Barth, Aaron J.; Ho, Luis C.; Filippenko, Alexei V.; Rix, Hans-Walter; Shields, Joseph C.; Sarzi, Marc; Sargent, Wallace L. W. (1 October 2008). "HUBBLE SPACE TELESCOPE SPECTROSCOPIC OBSERVATIONS OF THE NARROW-LINE REGION IN NEARBY LOW-LUMINOSITY ACTIVE GALACTIC NUCLEI". The Astronomical Journal. 136 (4): 1677–1702. arXiv:0808.0914. Bibcode:2008AJ....136.1677W. doi:10.1088/0004-6256/136/4/1677.