@article{SM_1975_27_1_a6,
     author = {Yu. M. Smirnov},
     title = {Sets of~$H$-fixed points are absolute extensors},
     journal = {Sbornik. Mathematics},
     pages = {85--92},
     year = {1975},
     volume = {27},
     number = {1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1975_27_1_a6/}
}