1. Mixed problem for semilinear hyperbolic system on the plane (in Russian);Abolinia;Mat. Sb.,1960
2. Generalized solutions to free boundary problems for hyperbolic systems of functional partial differential equations;Bassanini;Ann. Mat. Pura Appl.,1990
3. Global solution of mixed problem for a certain system of nonlinear conservation laws;Doktor;Czech. Math. J.,1977
4. Local solutions of mixed problem for hyperbolic system of quasilinear equations in two variables (in Russian);Filimonov,1982
5. Sufficient conditions of global solvability of a mixed problem for quasilinear hyperbolic systems in two independent variables (in Russian);Filimonov,1980