@article{TMF_1974_18_3_a1,
     author = {N. A. Chernikov and N. S. Shavokhina},
     title = {Conformal momentum},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {310--317},
     year = {1974},
     volume = {18},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1974_18_3_a1/}
}