Gulay А. P. RussiaSaratov Saratov State University, ul. Astrakhanskaya, 83, Saratov, 410012, Russia Master’s Studentgulai.artem@gmail.com Additional info Scientific interests. Synchronization, multistability, bifurcation analysis. Author's articles THE STUDY OF MULTISTABILITY AND EXTERNAL SYNCHRONIZATION IN NONAUTONOMOUS SYSTEM OF TWO COUPLED VAN DER POL OSCILLATORS WITH REPULSIVE COUPLING