@article{MZM_2017_101_5_a10,
     author = {M. A. Sadybekov and N. S. Imanbaev},
     title = {A {Regular} {Differential} {Operator} with {Perturbed} {Boundary} {Condition}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {768--778},
     publisher = {mathdoc},
     volume = {101},
     number = {5},
     year = {2017},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2017_101_5_a10/}
}