Currently interested in: quantization of gauge invariant theories, massive gravity, symmetries and dualities in field theories, BRST symmetry, quantization methods (BFFT, BFV, BV, FJBW, BRST, gauge-unfixing), string theory, representation theory of groups and algebras, (deformed) algebraic structures in mathematical physics, constrained hamiltonian systems, Lie algebras and superalgebras in physics, supersymmetry, higher-derivative models, Gribov ambiguities.