@article{RM_1973_28_6_a23,
     author = {S. G. Smirnov},
     title = {Smooth knots in a~manifold with a~contractible of spherical universal covering},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     year = {1973},
     volume = {28},
     number = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/RM_1973_28_6_a23/}
}