@article{DAN_1990_313_2_a14,
     author = {E. F. Popov},
     title = {On the conservation of some tensor quantities during the interaction of charged particles
},
     journal = {Doklady Akademii Nauk},
     pages = {321--325},
     publisher = {mathdoc},
     volume = {313},
     number = {2},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1990_313_2_a14/}
}