@article{FAA_1994_28_4_a11,
     author = {V. A. Yurko},
     title = {On {Differential} {Operators} with {Nonseparated} {Boundary} {Conditions}},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {90--92},
     publisher = {mathdoc},
     volume = {28},
     number = {4},
     year = {1994},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1994_28_4_a11/}
}