@article{GDZPPN00231374X,
title = {Vector Fields and Chern Numbers.},
journal = {Mathematische Annalen},
volume = {229},
year = {1977},
pages = {263-274},
zbl = {0365.32020},
url = {http://dml.mathdoc.fr/item/GDZPPN00231374X}
}
Carrell, J.B.; Liebermann, D.L. Vector Fields and Chern Numbers.. Mathematische Annalen, Tome 229 (1977) pp. 263-274. http://gdmltest.u-ga.fr/item/GDZPPN00231374X/