@article{DAN_1969_185_6_a5,
     author = {N. H. Ibragimov},
     title = {The invariance of the {Dirac} equations},
     journal = {Doklady Akademii Nauk},
     pages = {1226--1228},
     publisher = {mathdoc},
     volume = {185},
     number = {6},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1969_185_6_a5/}
}