Aldashev SA. Criterion for the uniqueness of a solution of the Darboux-Protter problem for multidimensional Hyperbolic equations with Chaplygin operator. Ukr. Mat. Zhurn. [Internet]. 2004Aug.25 [cited 2024Nov.22];56(8):1119–1127. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/3826