@article{DAN_1977_232_4_a18,
     author = {W. I. Fushchych and Yu. N. Segeda},
     title = {On a new invariance algebra of the free {Schr\"odinger} equation},
     journal = {Doklady Akademii Nauk},
     pages = {800--801},
     publisher = {mathdoc},
     volume = {232},
     number = {4},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1977_232_4_a18/}
}