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@article{DAN_1973_210_4_a5, author = {Yu. B. Rudyak}, title = {On the fundamental group of a three-dimensional manifold}, journal = {Doklady Akademii Nauk}, pages = {771--774}, publisher = {mathdoc}, volume = {210}, number = {4}, year = {1973}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1973_210_4_a5/} }
Yu. B. Rudyak. On the fundamental group of a three-dimensional manifold. Doklady Akademii Nauk, Tome 210 (1973) no. 4, pp. 771-774. http://geodesic.mathdoc.fr/item/DAN_1973_210_4_a5/