A hypercontinuous hypersmooth Schwarzschild line element transformation.
A space-time theorem in the de Sitter-world. (Ein Raum-Zeit-Satz für die de Sitter-Welt.)
Accelerated Lyra's cosmology driven by electromagnetic field in inhomogeneous universe.
An application of the special Reissner-Nordström space-time to description of the universe in the neighbourhood of the Planck era
The description of the special Reissner-Nordström space-time in the Planck era is presented and its comparison with the Robertson-Walker space-time is given.
An explicit determination of the Petrov type N space-times on which the conformally invariant scalar wave equation satisfies Huygens' principle