Period variations in pulsating X-ray sources. I - Accretion flow parameters and neutron star structure from timing observations

Period, Amplitude and Light Curve of V38 in M13

Period-luminosity relations for red supergiant variables - II. The distance to M101

Perioden- Und Lichtkurvenanderungen Von AR Herculis

Periodgram Analysis of the Zurich and Schove Series. Stability of the Quasi-Century and Quasi-Two Century Solar Cycles.

Periodic activity of Comet Bradfield 1987s

Periodic and aperiodic variability of the interacting binary and long-periodic stars

Periodic anomalies in Earth-Mars range

Periodic Clustering of Red-shifts in the Spectra of Quasi-stellar and other Unusual Objects

Periodic crossings of Saturn's magnetospheric current/plasma sheet observed by Cassini CAPS/ELS and MAG

Periodic earthquakes in Alaska and Central America

Periodic Emission from the Gamma-Ray Binary 1FGL J1018.6-5856

Periodic fadings in VHF radio-satellite transmissions during the solar eclipse on 23 October 1976

Periodic fields in five-dimensional relativity

Periodic magma movement in the conduit with a barrier - A model for the volcanic tremor

Periodic magnetospheric substorms and the effect of solar wind

Periodic magnetospheric substorms and their relationship with solar wind pressure variations

Periodic microvariation of B416, a new luminous blue variable in M33

Periodic motions of a satellite with a strong magnet in the polar-orbit plane with allowance for perturbations

Periodic Orbits in a Mechanical System with Strongly Coupled Spin and Orbital Motions