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”, Astrophysical Journal Supplement 112 (2): 315–390, doi:10.1086/313041, Bibcode: 1997ApJS..112..315H
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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”, Astrophysical Journal Supplement 112 (2): 315–390, doi:10.1086/313041, Bibcode: 1997ApJS..112..315H