L. C. Ho, A. V. Filippenko, W. L. W. Sargent (1997). “A Search for "Dwarf" Seyfert Nuclei. III. Spectroscopic Parameters and Properties of the Host Galaxies”. Astrophysical Journal Supplement112 (2): 315–390. arXiv:astro-ph/9704107. Bibcode: 1997ApJS..112..315H. doi:10.1086/313041.
Y. Terashima, N. Iyomoto, L. C. Ho, A. F. Ptak (2002). “X-Ray Properties of LINERs and Low-Luminosity Seyfert Galaxies Observed with ASCA. I. Observations and Results”. Astrophysical Journal Supplement139 (1): 1–36. arXiv:astro-ph/0203005. Bibcode: 2002ApJS..139....1T. doi:10.1086/324373.
L. C. Ho, A. V. Filippenko, W. L. W. Sargent (1997). “A Search for "Dwarf" Seyfert Nuclei. III. Spectroscopic Parameters and Properties of the Host Galaxies”. Astrophysical Journal Supplement112 (2): 315–390. arXiv:astro-ph/9704107. Bibcode: 1997ApJS..112..315H. doi:10.1086/313041.
Y. Terashima, N. Iyomoto, L. C. Ho, A. F. Ptak (2002). “X-Ray Properties of LINERs and Low-Luminosity Seyfert Galaxies Observed with ASCA. I. Observations and Results”. Astrophysical Journal Supplement139 (1): 1–36. arXiv:astro-ph/0203005. Bibcode: 2002ApJS..139....1T. doi:10.1086/324373.
G. Helou, E. E. Salpeter, Y. Terzian (1982). “Neutral hydrogen in binary and multiple galaxies”. Astronomical Journal87: 1443–1464. Bibcode: 1982AJ.....87.1443H. doi:10.1086/113235.
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L. C. Ho, A. V. Filippenko, W. L. W. Sargent (1997). “A Search for "Dwarf" Seyfert Nuclei. III. Spectroscopic Parameters and Properties of the Host Galaxies”. Astrophysical Journal Supplement112 (2): 315–390. arXiv:astro-ph/9704107. Bibcode: 1997ApJS..112..315H. doi:10.1086/313041.
Y. Terashima, N. Iyomoto, L. C. Ho, A. F. Ptak (2002). “X-Ray Properties of LINERs and Low-Luminosity Seyfert Galaxies Observed with ASCA. I. Observations and Results”. Astrophysical Journal Supplement139 (1): 1–36. arXiv:astro-ph/0203005. Bibcode: 2002ApJS..139....1T. doi:10.1086/324373.
G. Helou, E. E. Salpeter, Y. Terzian (1982). “Neutral hydrogen in binary and multiple galaxies”. Astronomical Journal87: 1443–1464. Bibcode: 1982AJ.....87.1443H. doi:10.1086/113235.