L. C. Ho; A. V. Filippenko; W. L. W. Sargent «A Search for "Dwarf" Seyfert Nuclei. III. Spectroscopic Parameters and Properties of the Host Galaxies». Astrophysical Journal Supplement, 112, 2, 1997, pàg. 315–390. arXiv: astro-ph/9704107. Bibcode: 1997ApJS..112..315H. DOI: 10.1086/313041.
Y. Terashima; N. Iyomoto; L. C. Ho; A. F. Ptak «X-Ray Properties of LINERs and Low-Luminosity Seyfert Galaxies Observed with ASCA. I. Observations and Results». Astrophysical Journal Supplement, 139, 1, 2002, pàg. 1–36. arXiv: astro-ph/0203005. Bibcode: 2002ApJS..139....1T. DOI: 10.1086/324373.
L. C. Ho; A. V. Filippenko; W. L. W. Sargent «A Search for "Dwarf" Seyfert Nuclei. III. Spectroscopic Parameters and Properties of the Host Galaxies». Astrophysical Journal Supplement, 112, 2, 1997, pàg. 315–390. arXiv: astro-ph/9704107. Bibcode: 1997ApJS..112..315H. DOI: 10.1086/313041.
Y. Terashima; N. Iyomoto; L. C. Ho; A. F. Ptak «X-Ray Properties of LINERs and Low-Luminosity Seyfert Galaxies Observed with ASCA. I. Observations and Results». Astrophysical Journal Supplement, 139, 1, 2002, pàg. 1–36. arXiv: astro-ph/0203005. Bibcode: 2002ApJS..139....1T. DOI: 10.1086/324373.
G. Helou; E. E. Salpeter; Y. Terzian «Neutral hydrogen in binary and multiple galaxies». Astronomical Journal, 87, 1982, pàg. 1443–1464. Bibcode: 1982AJ.....87.1443H. DOI: 10.1086/113235.
L. C. Ho; A. V. Filippenko; W. L. W. Sargent «A Search for "Dwarf" Seyfert Nuclei. III. Spectroscopic Parameters and Properties of the Host Galaxies». Astrophysical Journal Supplement, 112, 2, 1997, pàg. 315–390. arXiv: astro-ph/9704107. Bibcode: 1997ApJS..112..315H. DOI: 10.1086/313041.
Y. Terashima; N. Iyomoto; L. C. Ho; A. F. Ptak «X-Ray Properties of LINERs and Low-Luminosity Seyfert Galaxies Observed with ASCA. I. Observations and Results». Astrophysical Journal Supplement, 139, 1, 2002, pàg. 1–36. arXiv: astro-ph/0203005. Bibcode: 2002ApJS..139....1T. DOI: 10.1086/324373.
G. Helou; E. E. Salpeter; Y. Terzian «Neutral hydrogen in binary and multiple galaxies». Astronomical Journal, 87, 1982, pàg. 1443–1464. Bibcode: 1982AJ.....87.1443H. DOI: 10.1086/113235.