@article{VSGTU_2007_1_a1,
     author = {L. A. Kovaleva},
     title = {On modified {Bitsadze--Samarskiy} problem},
     journal = {Journal of Samara State Technical University, Ser. Physical and Mathematical Sciences},
     pages = {10--15},
     publisher = {mathdoc},
     number = {1},
     year = {2007},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VSGTU_2007_1_a1/}
}