@article{TMF_1984_59_2_a4,
     author = {V. A. Bordovitsyn and I. M. Ternov},
     title = {Invariant definition of relativistic spin states in classical and quantum theories with an external field},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {220--223},
     publisher = {mathdoc},
     volume = {59},
     number = {2},
     year = {1984},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1984_59_2_a4/}
}