Thronson, Harley A. Jr.; et al. (1 August 1989), "Near-infrared image of NGC 1068 - Bar-driven star formation and the circumnuclear composition", Astrophysical Journal, Part 1, 343: 158–168, Bibcode:1989ApJ...343..158T, doi:10.1086/167693.
Alexander, Tal; Lutz, Dieter; Sturm, Eckhard; Genzel, Reinhard; Sternberg, Amiel; Netzer, Hagai (June 2000), "Infrared Spectroscopy of NGC 1068: Probing the Obscured Ionizing AGN Continuum", The Astrophysical Journal, 536 (2): 710–717, arXiv:astro-ph/0002107, Bibcode:2000ApJ...536..710A, doi:10.1086/308973, S2CID15617708.
Thronson, Harley A. Jr.; et al. (1 August 1989), "Near-infrared image of NGC 1068 - Bar-driven star formation and the circumnuclear composition", Astrophysical Journal, Part 1, 343: 158–168, Bibcode:1989ApJ...343..158T, doi:10.1086/167693.
Alexander, Tal; Lutz, Dieter; Sturm, Eckhard; Genzel, Reinhard; Sternberg, Amiel; Netzer, Hagai (June 2000), "Infrared Spectroscopy of NGC 1068: Probing the Obscured Ionizing AGN Continuum", The Astrophysical Journal, 536 (2): 710–717, arXiv:astro-ph/0002107, Bibcode:2000ApJ...536..710A, doi:10.1086/308973, S2CID15617708.