@article{05726426, title = {A set of axioms for the degree of a tangent vector field on differentiable manifolds.}, journal = {Fixed Point Theory and Applications [electronic only]}, volume = {2010}, year = {2010}, doi = {10.1155/2010/845631}, zbl = {1196.57026}, language = {en}, url = {http://dml.mathdoc.fr/item/05726426} }
Furi, Massimo; Pera, Maria Patrizia; Spadini, Marco. A set of axioms for the degree of a tangent vector field on differentiable manifolds.. Fixed Point Theory and Applications [electronic only], Tome 2010 (2010) . doi : 10.1155/2010/845631. http://gdmltest.u-ga.fr/item/05726426/