@article{ZVMMF_1968_8_6_a31,
     author = {Yu. P. Pyt'ev},
     title = {Formalisme lagrangien et lois de symetrie: {M.~Gourdin.} {VIII+100~p.} {Gordon} and {Breach} {Sci.} {Pubis.,} 1968},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {1419--1420},
     year = {1968},
     volume = {8},
     number = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1968_8_6_a31/}
}