@article{TMF_1990_83_3_a9,
     author = {I. V. Lutsenko and G. S. Pogosyan and A. N. Sisakyan and V. M. Ter-Antonyan},
     title = {Hydrogen atom as~indicator of~hidden symmetry of~a~ring-shaped potential},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {419--427},
     publisher = {mathdoc},
     volume = {83},
     number = {3},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1990_83_3_a9/}
}