@article{TMF_1969_1_3_a3,
     author = {B. L. Markovski and D. Ts. Stoyanov},
     title = {Invariant equations for nonlinearly-transforming fields and laws of conservation},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {337--349},
     publisher = {mathdoc},
     volume = {1},
     number = {3},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1969_1_3_a3/}
}