@article{02012652,
title = {On Pierce-like idempotents and Hopf invariants.},
journal = {International Journal of Mathematics and Mathematical Sciences},
volume = {2003},
year = {2003},
pages = {3903-3920},
doi = {10.1155/S016117120330331X},
zbl = {1036.55003},
language = {en},
url = {http://dml.mathdoc.fr/item/02012652}
}
Dula, Giora; Hilton, Peter. On Pierce-like idempotents and Hopf invariants.. International Journal of Mathematics and Mathematical Sciences, Tome 2003 (2003) pp. 3903-3920. doi : 10.1155/S016117120330331X. http://gdmltest.u-ga.fr/item/02012652/