@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/