@article{MZM_1991_50_1_a12,
     author = {T. N. Fomenko},
     title = {Algebraic properties of certain cohomological invariants of equivariant mappings},
     journal = {Matemati\v{c}eskie zametki},
     pages = {108--117},
     publisher = {mathdoc},
     volume = {50},
     number = {1},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1991_50_1_a12/}
}