@article{1250126379, author = {Petro, John}, title = {Great sphere fibrations of manifolds}, journal = {Rocky Mountain J. Math.}, volume = {17}, number = {4}, year = {1987}, pages = { 865-886}, language = {en}, url = {http://dml.mathdoc.fr/item/1250126379} }
Petro, John. Great sphere fibrations of manifolds. Rocky Mountain J. Math., Tome 17 (1987) no. 4, pp. 865-886. http://gdmltest.u-ga.fr/item/1250126379/