Bilchev Svetoslav Jordanov

Publications in Math-Net.Ru

1. The linearity of systems of two first order partial differential equations
   
   Izv. Vyssh. Uchebn. Zaved. Mat., 1974, no. 1,  3–14
2. Systems of two first order partial differential equations (the conservation laws)
   
   Izv. Vyssh. Uchebn. Zaved. Mat., 1970, no. 6,  28–34
3. Systems of two first order partial differential equations (local theory)
   
   Izv. Vyssh. Uchebn. Zaved. Mat., 1970, no. 3,  14–21