@article{TMF_1992_91_2_a0,
     author = {A. A. Kiselev and B. S. Pavlov and N. N. Penkina and M. G. Suturin},
     title = {Allowance for interaction symmetry in the theory of extensions},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {179--191},
     publisher = {mathdoc},
     volume = {91},
     number = {2},
     year = {1992},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1992_91_2_a0/}
}