Voir la notice de l'article provenant de la source Math-Net.Ru
@article{MAT_1958_2_6_a1, author = {N. E. Steenrod}, title = {Cohomology operations, and obstructions to extending continuous functions}, journal = {Matematika}, pages = {11--48}, publisher = {mathdoc}, volume = {2}, number = {6}, year = {1958}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MAT_1958_2_6_a1/} }
N. E. Steenrod. Cohomology operations, and obstructions to extending continuous functions. Matematika, Tome 2 (1958) no. 6, pp. 11-48. http://geodesic.mathdoc.fr/item/MAT_1958_2_6_a1/