@article{MZM_2003_73_3_a18,
     author = {O. Yu. Shvedov},
     title = {On {Quasiclassical} {Field} {Theories} {Invariant} with {Respect} to a {Lie} {Group}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {474--477},
     year = {2003},
     volume = {73},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2003_73_3_a18/}
}