Seliverstova E. S. RussiaSaratov Saratov State University, ul. Astrakhanskaya, 83, Saratov, 410012, Russia esseliverstova@yandex.ru Additional info Студентка 3 курса факультета нелинейных процессов СГУ. Область научных интересов - теория колебаний и волн. Author's articles ON THE QUESTION OF TWO SELF-EXCITING OSCILLATION MODELS IN NON- PHYSICAL SYSTEMS PHENOMENON OF THE VAN DER POL EQUATION AMAZING ROBERT ADLER. Adler’s tube, Adler’s equation, and more