The main results:
Theory of magnetic superconductors, theory of Josephson junctions (pi-contacts) with magnetic metals and exchange field (with L.Bulaevskii); dynamics of quantum dissipative system (with A.Zaikin); theory of glassy states in disordered systems (sine-gordon model, granular high-temperature superconductors); development of replica technique in the theory of polymer systems; theory of infinite cluster in percolation theory; theory of polymer networks; theory of topological interactions in the statistical theory of polymers; theory of evolution formation of unical structure of polypeptide chains; statistics of polymers in random media; theory of elasticity and relaxation dynamics of "soft" solids; theory of microphase separation in polyblock copolymers; statistical physics of interacting dislocation loops; theory of thermal fluctuations of elastic filaments with spontaneous curvature and torsion