@article{MZM_2011_89_2_a5,
     author = {V. B. Didenko},
     title = {On the {Spectral} {Properties} of {Differential} {Operators} with {Unbounded} {Operator} {Coefficients} {Determined} by a {Linear} {Relation}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {226--240},
     publisher = {mathdoc},
     volume = {89},
     number = {2},
     year = {2011},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2011_89_2_a5/}
}