J. H. Krolik

Broad-band properties of the CfA Seyfert galaxies. III - Ultraviolet variability

R Edelson, G. Pike, J. Krolik, 1990 .

Steps toward Determination of the Size and Structure of the Broad-Line Region in Active Galactic Nuclei. XIII. Ultraviolet Observations of the Broad-Line Radio Galaxy 3C 390.3

G. A. Reichert, B. M. Peterson, D. M. Crenshaw, 1998, astro-ph/9806216.

Sloan digital sky survey: Early data release

Alexander S. Szalay, Jeremiah P. Ostriker, Mamoru Doi, 2002 .

Far-Ultraviolet Observations of NGC 4151 during the ORFEUS-SPAS II Mission

A. F. Davidsen, W. Zheng, J. H. Krolik, 1997 .