@article{GDZPPN002302195, title = {Some Relations Between Curvature and Characteristic Classes.}, journal = {Mathematische Annalen}, volume = {189}, year = {1970}, pages = {257-267}, zbl = {0181.49901}, url = {http://dml.mathdoc.fr/item/GDZPPN002302195} }
GRAY, A. Some Relations Between Curvature and Characteristic Classes.. Mathematische Annalen, Tome 189 (1970) pp. 257-267. http://gdmltest.u-ga.fr/item/GDZPPN002302195/