Evtukhov, V. M., and KorepanovaЕ. S. 2017. “Asymptotic Representation of Solutions of Differential equations with Rightly Varying Nonlinearities”. Ukrains’kyi Matematychnyi Zhurnal 69 (9), 1198-1216. https://umj.imath.kiev.ua/index.php/umj/article/view/1770.