@article{RM_1976_31_2_a16,
     author = {G. A. Suvorchenkova},
     title = {Asymptotic behavior of the spectral function of a~first order differential equation with an unbounded operator coefficient},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     year = {1976},
     volume = {31},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/RM_1976_31_2_a16/}
}