1. Incorrectness of Dirichlet's problem for the mixed type of equations in mixed regions;Bitsadze AV;Dokl Akad Nauk SSSR,1958
2. An uniqueness condition of the Dirichlet problem for an equation of mixed type in a cylindrical domain;Nakhushev AM;Differ Uravn,1970
3. Dirichlet‐type problems for the Lavrent'ev‐Bitsadze equation. I. Uniqueness theorems;Soldatov AP;Dokl Math,1994
4. Dirichlet‐type problems for the Lavrent'ev‐Bitsadze equation. II. Existence theorems;Soldatov AP;Dokl Math,1994
5. A dirichlet problem for an equation of mixed type with a discontinuous coefficient