ZernovA. E., and KuzinaYu. V. “Asymptotic Behavior of Solutions of the Cauchy Problem <em class="a-Plus-plus">x</em>′ = <em class="a-Plus-plus">f</em>(<em class="a-Plus-plus">t</em>, <em class="a-Plus-plus">x</em>, <em class="a-Plus-plus">x</em>′), <em class="a-Plus-plus">x</Em&gt;(0) = 0”. Ukrains’kyi Matematychnyi Zhurnal 54, no. 12 (December 25, 2002): 1698-1703. Accessed November 22, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/4209.