Kochubei, A. N. “Strongly Nonlinear Differential Equations With Carlitz Derivatives over a Function Field”. Ukrains’kyi Matematychnyi Zhurnal 57, no. 5 (May 25, 2005): 669–678. Accessed May 17, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/3633.