@article{GDZPPN002057034,
title = {Cohomology Operations derived from Cyclic Groups},
journal = {Commentarii mathematici Helvetici},
volume = {32},
year = {1957},
pages = {129-152},
zbl = {0090.39101},
url = {http://dml.mathdoc.fr/item/GDZPPN002057034}
}
Steenrod, N.E., Thomas, Emery. Cohomology Operations derived from Cyclic Groups. Commentarii mathematici Helvetici, Tome 32 (1957) pp. 129-152. http://gdmltest.u-ga.fr/item/GDZPPN002057034/