4C 39.25: Witnessing the interaction between a moving and a stationary component

4C 39.29 - extended emission around a powerful Type 2 quasar

4C 61.20 and OF-024 - Optically active extragalactic radio sources

4C02.27: a quasar with episodic activity?

4d Deformed Special Relativity from Group Field Theories

4D diffeomorphisms in canonical gravity and abelian deformations

4d Lorentzian Holst action with topological terms

4D Modeling of CME expansion and EUV dimming observed with STEREO/EUVI

4D Modeling of CME Expansion and EUV Dimming Observed with STEREO/EUVI

4d neutral dilatonic black holes and (4+p) dimensional nondilatonic black p-branes

4D quantum black hole physics from 2D models?

4D spacetimes embedded in 5D light-like Kasner universes

4D static solutions with interacting phantom fields

4D Wormhole with Signature Change in the Presence of Extra Dimensions

4d2: a high-performance visualization tool for CFD and particle data visualization

4mu spectra of AGB stars I: Observations

4pi Models of CMEs and ICMEs

4th Annual IGPP International Astrophysics Conference on the Physics of Collisionless Shocks

4th Meeting of the High Energy Astrophysics Division of the American Astronomical Society

4U 0115+63 from RXTE and INTEGRAL Data: Pulse Profile and Cyclotron Line Energy