Ultraluminous X-ray Sources, High Redshift QSOs and Active Galaxies

Ultraluminous X-ray Sources: Beambags and Optical Counterparts

Ultraluminous X-ray Sources: Bubbles and Optical Counterparts

Ultrarapid Activity at Hα in the Spectra of be Stars

Ultrarelativistic black hole in an external electromagnetic field and gravitational waves in the Melvin universe

Ultrarelativistic boost of spinning and charged black rings

Ultrarelativistic boost of spinning black rings

Ultrarelativistic boost of the black ring

Ultrarelativistic circular orbits of spinning particles in a Schwarzschild field

Ultrarelativistic fluid dynamics

Ultrarelativistic limits of boosted dilaton black holes

Ultrarelativistic low-frequency electromagnetic waves in pulsar magnetospheres

Ultrarelativistic Motion: Inertial and Tidal Effects in Fermi Coordinates

Ultrarelativistic sources in nonlinear electrodynamics

Ultrasensitive dust monitor for the Advanced X-ray Astrophysics Facility (AXAF)

Ultrashort-Period Binaries, Gravitational Radiation, and Mass Transfer. I. The Standard Model, with Applications to WZ Sagittae and Z Camelopardalis

Ultrashort-Period Binaries. II. HZ 29 (=AM CVn): a Double-White Semidetached Postcataclysmic Nova?

Ultrashort-period binaries. III - The accretion of hydrogen-rich matter onto a white dwarf of one solar mass

Ultrashort-Period Stellar Oscillations. I. Results from White Dwarfs, Old Novae, Central Stars of Planetary Nebulae, 3c 273, and Scorpius XR-1

Ultrashort-Period Stellar Oscillations. II. The Period and Light Curve of HZ 29