@article{VSGTU_2017_21_1_a3,
     author = {R. M. Safina},
     title = {The {Dirichlet} problem for a mixed-type equation 
},
     journal = {Journal of Samara State Technical University, Ser. Physical and Mathematical Sciences},
     pages = {80--93},
     publisher = {mathdoc},
     volume = {21},
     number = {1},
     year = {2017},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VSGTU_2017_21_1_a3/}
}