Doktor nauk
In 1967 he defended a PhD thesis on the topic "Diffracting beams in nonlinear media" under the supervision of academician R. V. Khokhlov. In 1974 he has passed habilitation and received a doctoral degree in physical and mathematical sciences. The topic of his Doktor nauk work was "Wave beams and pulses in nonlinear media". In 1977 he received a professor title at the Chair of General Physics and Wave Processes.