@article{1255456056,
author = {Peterson, F. P. and Stein, N.},
title = {The dual of a secondary cohomology operation},
journal = {Illinois J. Math.},
volume = {4},
number = {1},
year = {1960},
pages = { 397-404},
language = {en},
url = {http://dml.mathdoc.fr/item/1255456056}
}
Peterson, F. P.; Stein, N. The dual of a secondary cohomology operation. Illinois J. Math., Tome 4 (1960) no. 1, pp. 397-404. http://gdmltest.u-ga.fr/item/1255456056/