@article{TMF_1978_36_2_a4,
     author = {S. N. Sokolov},
     title = {Relativistic addition of direct interactions in the point form of dynamics},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {193--207},
     publisher = {mathdoc},
     volume = {36},
     number = {2},
     year = {1978},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1978_36_2_a4/}
}