@article{MZM_1974_15_3_a12,
     author = {G. N. Gestrin},
     title = {Expansion in characteristic functions of the {Schr\"odinger} operator with a~singular potential},
     journal = {Matemati\v{c}eskie zametki},
     pages = {455--465},
     publisher = {mathdoc},
     volume = {15},
     number = {3},
     year = {1974},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1974_15_3_a12/}
}