Duschl, W J. Wagner, S. J. Camenzind, M.
Variability of active galaxies Proceedings, Heidelberg, Germany, 1990 - Berlin Springer-Verlag 1991 - 312 - Lecture notes in physics ; 00377 .
3540538607
53 LNP
Variability of active galaxies Proceedings, Heidelberg, Germany, 1990 - Berlin Springer-Verlag 1991 - 312 - Lecture notes in physics ; 00377 .
3540538607
53 LNP