@article{MZM_2007_81_4_a2,
     author = {O. A. Veliev},
     title = {Non-Self-Adjoint {Sturm{\textendash}Liouville} {Operators} with {Matrix} {Potentials}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {496--506},
     year = {2007},
     volume = {81},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2007_81_4_a2/}
}