@article{DAN_1975_220_1_a13,
     author = {B. G. Konopelchenko and Yu. B. Rumer},
     title = {The noncompact algebra $\mathrm{SO}(2,1)$ and the classification of potentials in the {Schr\"odinger} equation},
     journal = {Doklady Akademii Nauk},
     pages = {58--60},
     publisher = {mathdoc},
     volume = {220},
     number = {1},
     year = {1975},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1975_220_1_a13/}
}