@article{DE_1991_27_3_a2,
     author = {A. M. Gomilko and G. V. Radzievskii},
     title = {Basis properties of eigenfunctions of a regular boundary value problem for a vector functional-differential equation},
     journal = {Differencialʹnye uravneni\^a},
     pages = {384--396},
     publisher = {mathdoc},
     volume = {27},
     number = {3},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1991_27_3_a2/}
}