Variability in η Car's circumstellar nebula

Variability investigations of possible Maia stars.

Variability Model for the Microquasar GRS 1915+105

Variability Models of Gamma-Ray Blazars

Variability Modes of Blazars from Intensive Optical Monitoring

Variability monitoring of OB stars during the Mons campaign

Variability morphologies in the color-magnitude diagram. Searching for secular variability

Variability Observations of a Complete Sample of Flat-Spectrum Radio Sources: Preliminary Results

Variability of 20-CANUM-VENATICORUM

Variability of A and F main sequence stars.

Variability of a composite chromospheric irradiance index during the 11-year activity cycle and over longer time periods

Variability of Accretion Disks Surrounding Black Holes ----- the Role of Inertial-Acoustic Mode Instabilities

Variability of accretion flow in the core of the Seyfert galaxy NGC 4151

Variability of Active Galactic Nuclei

Variability of Active Galactic Nuclei from the Optical to X-ray Regions

Variability of AGN gleaned from calibration data at MPIfR

Variability of B and Be stars in the LMC/SMC: binaries and pulsations

Variability of Balmer lines in AP stars

Variability of Balmer Profiles in Magnetic Ap/Bp Stars

Variability of Be Stars in Southern Open Clusters