@article{DE_1978_14_1_a6,
     author = {A. M. Nakhushev},
     title = {On the theory of linear boundary value problems for a second order equation of mixed hyperbolic-parabolic type},
     journal = {Differencialʹnye uravneni\^a},
     pages = {66--73},
     publisher = {mathdoc},
     volume = {14},
     number = {1},
     year = {1978},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1978_14_1_a6/}
}