Spectrscopic monitoring of active galactic nuclei. 3 : Size of the broad line region in NGC 3227I. Salamanca, I. Wanders, A. G. de Bruyn et al.|Leiden Repository (Leiden University)|1994Cited by 4
Spectroscopic monitoring of active galactic nuclei. II: The Seyfert-1 galaxy NGC 3516I. Wanders, R. Williams, E. van Groningen et al.|Unknown|1993Cited by 1