[1]
E. V. Oleinik, “On the Integration of a Nonlinear System of Differential Equations”, Ukr. Mat. Zhurn., vol. 66, no. 9, pp. 1223–1234, Sep. 2014, Accessed: Dec. 05, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/2213