Ho, Luis C.; Filippenko, Alexei V.; Sargent, Wallace L. W. (1997). «A Search for 'Dwarf' Seyfert Nuclei. III. Spectroscopic Parameters and Properties of the Host Galaxies». Astrophysical Journal Supplement112: 315. doi:10.1086/313041. Bibcode: 1997ApJS..112..315H.
Ho, Luis C.; Filippenko, Alexei V.; Sargent, Wallace L. W. (1997). «A Search for 'Dwarf' Seyfert Nuclei. III. Spectroscopic Parameters and Properties of the Host Galaxies». Astrophysical Journal Supplement112: 315. doi:10.1086/313041. Bibcode: 1997ApJS..112..315H.
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«Hidden Galaxy IC 342». Astronomy Picture of the Day. NASA. 22 Δεκεμβρίου 2010. Ανακτήθηκε στις 28 Ιανουαρίου 2013.