@article{MZM_2002_71_1_a15,
     author = {V. A. Yurko},
     title = {On {Higher-Order} {Differential} {Operators} with {Singularity} inside the {Interval}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {152--156},
     publisher = {mathdoc},
     volume = {71},
     number = {1},
     year = {2002},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2002_71_1_a15/}
}