Buhrii, O.M., O.T. Kholyavka, P.Ya. Pukach, and M.I. Vovk. “Cauchy Problem for Hyperbolic Equations of Third Order With Variable Exponent of Nonlinearity”. Carpathian Mathematical Publications 12, no. 2 (December 27, 2020): 419–433. Accessed July 12, 2024. https://journals.pnu.edu.ua/index.php/cmp/article/view/4166.