Variability of Soft X-ray Spectral Shape in Blazars Observed by ROSAT

Variability of Soft X-ray Spectral Shape: Narrow-Line Seyfert 1 Galaxies versus Broad-Line Seyfert 1 Galaxies

Variability of solar Lyman alpha and total solar irradiance

Variability of southern and northern periodicities of Saturn Kilometric Radiation

Variability of Southern T Tauri Stars I: The Continuum and the H$β$ Inverse PCygni Profile of GQ LUPI

Variability of sub-mJy radio sources

Variability of surface flows on the Sun and the implications for exoplanet detection

Variability of T Tauri-Like Stars in NGC 2264

Variability of the Accretion Stream in the Eclipsing Polar EP Dra

Variability of the AP stars HD 116458 and HD 116890

Variability of the BL Lacertae objects PKS 2155 - 304 and OJ 287 in the far-ultraviolet

Variability of the Blazar BL Lac in 2001

Variability of the broad absorption lines in the QSO UM 232

Variability of the continuum and the emission lines in the Seyfert 1 galaxy AKN 120

Variability of the Delta Scuti Stars

Variability of the dust forming binary Wolf-Rayet Star HD192641 (WR137)

Variability of the emission-line spectra and optical continua of Seyfert galaxies. I

Variability of the emission-line spectra and optical continua of Seyfert galaxies. II

Variability of the envelope of the Wolf-Rayet eclipsing binary CQ Cephei = HD 214419

Variability of the EROS no. 2 microlensing candidate.