Covariant Electromagnetic Potentials and Fields in Friedmann Universes
Curvature collineations in general relativity. I.
Curvature collineations in general relativity. II.
Curvature of gravitationally bound mechanical systems.
Curvatures of hypersurfaces of transitivity of Bianchi model universes
Cylindrically symmetric thin walls in general relativity.
Cylindrically symmetric viscous fluid universe in Lyra geometry
Cylindrically symmetric viscous universes.