Field:
- high energy astrophysics

Main interests:
- active galactic nuclei;
- astrophysical jets;
- cosmic gamma-ray sources

Particular topics:
- radio-loudness of active galactic nuclei;
- production of jets in compact objects with accretion disks;
- structure and propagation of jets;
- theory of blazars;
- a black hole spin and its evolution;
- high energy processes in gamma-ray sources