@article{MZM_2002_71_1_a13,
     author = {\'E. A. Nazirova and Ya. T. Sultanaev},
     title = {On the {Deficiency} {Indices} of {Singular} {Differential} {Operators} in the {Degenerate} {Case}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {144--147},
     publisher = {mathdoc},
     volume = {71},
     number = {1},
     year = {2002},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2002_71_1_a13/}
}