@article{IM2_1994_42_3_a7,
     author = {S. M. Ageev},
     title = {Topological proofs of {Keller's} theorem and an equivariant version of it},
     journal = {Izvestiya. Mathematics },
     pages = {621--629},
     publisher = {mathdoc},
     volume = {42},
     number = {3},
     year = {1994},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1994_42_3_a7/}
}