@article{MZM_2003_74_6_a0,
     author = {A. R. Aliev},
     title = {Boundary-Value {Problems} for a {Class} of {Operator} {Differential} {Equations} of {High} {Order} with {Variable} {Coefficients}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {803--814},
     publisher = {mathdoc},
     volume = {74},
     number = {6},
     year = {2003},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2003_74_6_a0/}
}