@article{TMF_1976_27_1_a1,
     author = {V. N. Pervushin},
     title = {Dynamical affine symmetry and covariant perturbation theory for gravitation},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {16--23},
     publisher = {mathdoc},
     volume = {27},
     number = {1},
     year = {1976},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1976_27_1_a1/}
}