[1]
I. E. Vitrychenko, “On the instability of one nonautonomous essentially nonlinear equation of thenth order”, Ukr. Mat. Zhurn., vol. 51, no. 6, pp. 835–841, Jun. 1999, Accessed: Apr. 09, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/4670