@article{SM_2016_207_2_a0,
     author = {S. M. Ageev},
     title = {On the exponent of $G$-spaces and isovariant extensors},
     journal = {Sbornik. Mathematics},
     pages = {155--190},
     publisher = {mathdoc},
     volume = {207},
     number = {2},
     year = {2016},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2016_207_2_a0/}
}