Paul B. Eskridge, Jay A. Frogel, Richard W. Pogge et et al., « Near-Infrared and Optical Morphology of Spiral Galaxies », The Astrophysical Journal Supplement Serie, vol. 143, no 1, , p. 73-111 (DOI10.1086/342340, Bibcode2002ApJS..143...73E, lire en ligne [PDF])
S. Comerón, J. H. Knapen, J. E. Beckman, E. Laurikainen, H. Salo, I. Martínez-Valpuesta et R. J. Buta, « AINUR: Atlas of Images of NUclear Rings », Monthly Notices of the Royal Astronomical Society, vol. 402#4, , p. 2462-2490 (DOI10.1111/j.1365-2966.2009.16057.x, Bibcode2010MNRAS.402.2462C, lire en ligne [PDF])
Jong-Hak Woo et Urry, « ACTIVE GALACTIC NUCLEUS BLACK HOLE MASSES AND BOLOMETRIC LUMINOSITIES », The Astrophysical Journal, vol. 579, , p. 46 pages (lire en ligne [PDF])
M. Yu. Piotrovich, Yu. N. Gnedin, N. A. Silant'ev, T. M. Natsvlishvili et S. D. Buliga, « A polarimetric method for measuring black hole masses in Active Galactic Nuclei », Monthly Notices of the Royal Astronomical Society, vol. 454, no 1, , p. 1157-1160 (DOI10.1093/mnras/stv2047, Bibcode2015MNRAS.454.1157P, lire en ligne [PDF])
John S. Mulchaey, Michael W. Regan et Arunav Kundu, « The Fueling of Nuclear Activity. I. A Near-Infrared Imaging Survey of Seyfert and Normal Galaxies », The Astrophysical Journal Supplement Series, vol. 110, no 2, , p. 299-319 (DOI10.1086/313005, Bibcode1997ApJS..110..299M, lire en ligne [PDF])
Paul B. Eskridge, Jay A. Frogel, Richard W. Pogge et et al., « Near-Infrared and Optical Morphology of Spiral Galaxies », The Astrophysical Journal Supplement Serie, vol. 143, no 1, , p. 73-111 (DOI10.1086/342340, Bibcode2002ApJS..143...73E, lire en ligne [PDF])
S. Comerón, J. H. Knapen, J. E. Beckman, E. Laurikainen, H. Salo, I. Martínez-Valpuesta et R. J. Buta, « AINUR: Atlas of Images of NUclear Rings », Monthly Notices of the Royal Astronomical Society, vol. 402#4, , p. 2462-2490 (DOI10.1111/j.1365-2966.2009.16057.x, Bibcode2010MNRAS.402.2462C, lire en ligne [PDF])
B. M. Peterson, L. Ferrarese, K. M. Gilbert et et al., « Central Masses and Broad-Line Region Sizes of Active Galactic Nuclei. II. A Homogeneous Analysis of a Large Reverberation-Mapping Database », The Astrophysical Journal, vol. 613, no 2, , p. 682-699 (DOI10.1086/423269, Bibcode2004ApJ...613..682P, lire en ligne [PDF])
M. Yu. Piotrovich, Yu. N. Gnedin, N. A. Silant'ev, T. M. Natsvlishvili et S. D. Buliga, « A polarimetric method for measuring black hole masses in Active Galactic Nuclei », Monthly Notices of the Royal Astronomical Society, vol. 454, no 1, , p. 1157-1160 (DOI10.1093/mnras/stv2047, Bibcode2015MNRAS.454.1157P, lire en ligne [PDF])
I M McHardy, S D Connolly, K Horne et et al., « X-ray/UV/optical variability of NGC 4593 with Swift: reprocessing of X-rays by an extended reprocessor », Monthly Notices of the Royal Astronomical Society, vol. 480, no 3, , p. 2881-2897 (DOI10.1093/mnras/sty1983, lire en ligne [PDF])
John S. Mulchaey, Michael W. Regan et Arunav Kundu, « The Fueling of Nuclear Activity. I. A Near-Infrared Imaging Survey of Seyfert and Normal Galaxies », The Astrophysical Journal Supplement Series, vol. 110, no 2, , p. 299-319 (DOI10.1086/313005, Bibcode1997ApJS..110..299M, lire en ligne [PDF])
Paul B. Eskridge, Jay A. Frogel, Richard W. Pogge et et al., « Near-Infrared and Optical Morphology of Spiral Galaxies », The Astrophysical Journal Supplement Serie, vol. 143, no 1, , p. 73-111 (DOI10.1086/342340, Bibcode2002ApJS..143...73E, lire en ligne [PDF])
S. Comerón, J. H. Knapen, J. E. Beckman, E. Laurikainen, H. Salo, I. Martínez-Valpuesta et R. J. Buta, « AINUR: Atlas of Images of NUclear Rings », Monthly Notices of the Royal Astronomical Society, vol. 402#4, , p. 2462-2490 (DOI10.1111/j.1365-2966.2009.16057.x, Bibcode2010MNRAS.402.2462C, lire en ligne [PDF])
B. M. Peterson, L. Ferrarese, K. M. Gilbert et et al., « Central Masses and Broad-Line Region Sizes of Active Galactic Nuclei. II. A Homogeneous Analysis of a Large Reverberation-Mapping Database », The Astrophysical Journal, vol. 613, no 2, , p. 682-699 (DOI10.1086/423269, Bibcode2004ApJ...613..682P, lire en ligne [PDF])
M. Yu. Piotrovich, Yu. N. Gnedin, N. A. Silant'ev, T. M. Natsvlishvili et S. D. Buliga, « A polarimetric method for measuring black hole masses in Active Galactic Nuclei », Monthly Notices of the Royal Astronomical Society, vol. 454, no 1, , p. 1157-1160 (DOI10.1093/mnras/stv2047, Bibcode2015MNRAS.454.1157P, lire en ligne [PDF])
John S. Mulchaey, Michael W. Regan et Arunav Kundu, « The Fueling of Nuclear Activity. I. A Near-Infrared Imaging Survey of Seyfert and Normal Galaxies », The Astrophysical Journal Supplement Series, vol. 110, no 2, , p. 299-319 (DOI10.1086/313005, Bibcode1997ApJS..110..299M, lire en ligne [PDF])
B. M. Peterson, L. Ferrarese, K. M. Gilbert et et al., « Central Masses and Broad-Line Region Sizes of Active Galactic Nuclei. II. A Homogeneous Analysis of a Large Reverberation-Mapping Database », The Astrophysical Journal, vol. 613, no 2, , p. 682-699 (DOI10.1086/423269, Bibcode2004ApJ...613..682P, lire en ligne [PDF])
Kelly D. Denney, Misty C. Bentz, Bradley M. Peterson et et al., « THE MASS OF THE BLACK HOLE IN THE SEYFERT 1 GALAXY NGC 4593 FROM REVERBERATION MAPPING », The American Astronomical Society, vol. 653, no 1, , p. 152-158 (lire en ligne [html])
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I M McHardy, S D Connolly, K Horne et et al., « X-ray/UV/optical variability of NGC 4593 with Swift: reprocessing of X-rays by an extended reprocessor », Monthly Notices of the Royal Astronomical Society, vol. 480, no 3, , p. 2881-2897 (DOI10.1093/mnras/sty1983, lire en ligne [PDF])