@article{DAN_1989_309_5_a1,
     author = {V. P. Burskii},
     title = {Boundary properties of $L_2$-solutions of linear differential},
     journal = {Doklady Akademii Nauk},
     pages = {1036--1039},
     publisher = {mathdoc},
     volume = {309},
     number = {5},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1989_309_5_a1/}
}