@article{IM2_1975_9_3_a6,
     author = {S. G. Smirnov},
     title = {Smooth knots in a~manifold of homotopy type~$K(\pi,1)$},
     journal = {Izvestiya. Mathematics },
     pages = {577--598},
     publisher = {mathdoc},
     volume = {9},
     number = {3},
     year = {1975},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1975_9_3_a6/}
}