Zyuryukin Yu. А. RussiaSaratov Yuri Gagarin State Technical University of Saratov, ul. Politechnicheskaya, 77, Saratov, 410054, Russia ProfessorDoctor of physical-matematical Sciences Additional info Author's articles WAVE EQUATIONS FOR THE POCKELS EFFECT DESCRIPTION IN CRYSTALS AND THEIR ANALYSIS ON THE EXAMPLE OF LITHIUM NIOBATE