@article{TMF_1975_23_1_a6,
     author = {T. Garaval'ya and D. Gomatam},
     title = {Schr\"odinger equation in helical coordinates},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {69--77},
     publisher = {mathdoc},
     volume = {23},
     number = {1},
     year = {1975},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1975_23_1_a6/}
}