@article{IVM_2003_6_a7,
     author = {K. B. Sabitov and S. L. Khasanova},
     title = {Spectral properties of a boundary value problem with a normal derivative in the boundary condition for equations of mixed type and their applications},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {64--76},
     publisher = {mathdoc},
     number = {6},
     year = {2003},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_2003_6_a7/}
}