Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{CMH_1957__32_139150, author = {N.E., Thomas, Emery Steenrod}, title = {Cohomology {Operations} derived from {Cyclic} {Groups}}, journal = {Commentarii mathematici Helvetici}, pages = {129--152}, publisher = {mathdoc}, volume = {32}, year = {1957}, zbl = {0090.39101}, url = {http://geodesic.mathdoc.fr/item/CMH_1957__32_139150/} }
N.E., Thomas, Emery Steenrod. Cohomology Operations derived from Cyclic Groups. Commentarii mathematici Helvetici, Tome 32 (1957), pp. 129-152. http://geodesic.mathdoc.fr/item/CMH_1957__32_139150/