On the stability of the scalar field in the gravitational field of a rotating (Kerr-) black hole
On the stability of the Taub universe
On the structure of space-time caustics
On the topology of black holes
On the total electric charge and mass of an elliptic universe
On the uniqueness of static perfect-fluid solutions in general relativity
On the universality of linear Lagrangians for gravitational field.
On theories of gravitation with nonsymmetric connection.
On two-dimensional supergravity and the quantum super-Möbius group
On Uncertainty Relations and States in Deformation Quantization
Operator representation of gravitational constraints in the case of a closed universe
Orbital period of a satellite of a planet in the relativistic theory of gravitation and in general relativity and the possibility of experimental verification of delay due to gravitational interaction
Orbits in a Magnetic Universe
Orthogonal transitivity, invertibility and null geodesic separability in type D vacuum solutions of Einstein's field equations with cosmological constant
Oscillating universe in the case p≠0