J.A. Baldwin, G. Ferland, K.T. Korista, F. Hamann, M. Dietrich: ApJ, 582, 590 (2003)
J.A. Baldwin, G. Ferland, K.T. Korista, D. Verner: ApJL, 455, L119 (1995)
R.D. Blandford, C.F. McKee: ApJ, 255, 419 (1982)
T.A. Boroson, R.F. Green: ApJS, 80, 109 (1992)
M. Bottorff, K.T. Korista, I. Shlosman, R.D. Blandford: ApJ, 479, 200 (1997)
S. Collier et al.: ApJ, 500, 162 (1998)
S. Collin-Souffrin, M. Joly, D. Pequignot, S. Dumont: A&A, 166, 27 (1986)
D.M. Crenshaw, S.B. Kraemer, I.M. George: ARAA, 41, 117 (2003)
M. Elvis: ApJ, 545, 63 (2000)
B. Espey: Velocity Diagnostics of the Broad Emission-Line Region of Active Galactic Nuclei. In: Emission Lines in Active Galaxies: New Methods and Techniques, ed. by B.M. Peterson, F.-Z. Cheng, A.S. Wilson (Astronomical Society of the Pacific 1997) pp 175–178
L. Ferrarese, R.W. Pogge, B.M. Peterson, D. Merritt, A. Wandel, C.L. Joseph: ApJ, 555, L79 (2001)
K. Gebhardt et al.: ApJ, 543, L5 (2000)
F. Hamann, G.J. Ferland: ARAA, 37, 487 (1999)
K. Horne, B.M. Peterson, S. Collier, H. Netzer: PASP, 116, 465 (2004)
S. Kaspi, P.S. Smith, H. Netzer, D. Maoz, B.T. Jannuzi, U. Giveon: ApJ, 533, 631 (2000)
K.T. Korista, J.A. Baldwin, G. Ferland, D. Verner: ApJS, 108, 401 (1997)
K.M. Leighly: ASCA (and HST) Observations of NLS1s. In: New Astronomy Reviews, ed. by Th. Boller, W.N. Brandt, K.M. Leighly, M.J. Ward (Elsevier: Amsterdam 2000) pp 395–402
N. Murray, J. Chiang: ApJ, 474, 91 (1997)
H. Netzer: AGN Emission Lines. In: Active Galactic Nuclei, ed. by T.J.-L. Courvoisier, M. Mayor (Springer-Verlag, Berlin Heidelberg New York 1990) pp 57–160
H. Netzer: Physical Processes in Starburst and Active Galaxies. In: The Starburst–AGN Connection, ed. by I. Aretxaga, D. Kunth, R. Mújica (World Scientific: Singapore 2001) pp 117–165
B.M. Peterson: PASP, 105, 247 (1993)
B.M. Peterson, An Introduction to Active Galactic Nuclei, (Cambridge University Press: Cambridge 1997)
B.M. Peterson: Variability of Active Galactic Nuclei. In: The Starburst–AGN Connection, ed. by I. Aretxaga, D. Kunth, R. Mújica (World Scientific: Singapore 2001) pp 3–67
B.M. Peterson, L. Ferrarese, K.M. Gilbert, S. Kaspi, M.A. Malkan, D. Maoz, D. Merritt, H. Netzer, C.A. Onken, R.W. Pogge, M. Vestergaard, A. Wandel: ApJ, 613, 682 (2004)
B.M. Peterson, A. Wandel: ApJL, 521, L95 (1993)
B.M. Peterson et al.: ApJ., 581, 197 (2002)
J.W. Sulentic, P. Marziani, D. Dultzin-Hacyan: ARAA, 38, 521 (2000)
T. Storchi-Bergmann, R. Nemmen da Silva, M. Eracleous, J.P. Halpern, A.S. Wilson, A.V. Filippenko, M.T. Ruiz, R.C. Smith, N.M. Nagar: ApJ, 598, 956 (2003)
M. Vestergaard, B.J. Wilkes, P.D. Barthel: ApJ, 538, 103 (2000)