For citations:

Dontsova M.V. Solvability conditions of the Cauchy problem for a system of first-order quasi-linear equations, where 𝑓1(𝑡, 𝑥), 𝑓2(𝑡, 𝑥), 𝑆1, 𝑆2 are given functions. Chebyshevskii Sbornik. 2023;24(2):165-178. (In Russ.) https://doi.org/10.22405/2226-8383-2023-24-2-165-178