@article{TMF_1971_6_3_a5,
     author = {L. P. Sokur and W. I. Fushchych},
     title = {Equations of motion invariant under the group $\mathscr{P}(1,n)$. {II}},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {348--363},
     publisher = {mathdoc},
     volume = {6},
     number = {3},
     year = {1971},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1971_6_3_a5/}
}