“The criterion of the unique decision of the first Darboux problem with deviation from the characteristics for Eiler-Darby-Puasson multidimensional equation is received”, JMMCS, vol. 64, no. 1, pp. 78–84, Feb. 2019, Accessed: Sep. 21, 2026. Available: https://bm.kaznu.kz/index.php/kaznu/article/view/599