Voir la notice de l'article provenant de la source Math-Net.Ru
@article{MZM_1968_4_2_a5, author = {V. L. Golo}, title = {An~invariant of multiply connected manifolds}, journal = {Matemati\v{c}eskie zametki}, pages = {155--163}, publisher = {mathdoc}, volume = {4}, number = {2}, year = {1968}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1968_4_2_a5/} }
V. L. Golo. An~invariant of multiply connected manifolds. Matematičeskie zametki, Tome 4 (1968) no. 2, pp. 155-163. http://geodesic.mathdoc.fr/item/MZM_1968_4_2_a5/