@article{1183525260, author = {Lima, Elon L.}, title = {Commuting vector fields on 2-manifolds}, journal = {Bull. Amer. Math. Soc.}, volume = {69}, number = {4}, year = {1963}, pages = { 366-368}, language = {en}, url = {http://dml.mathdoc.fr/item/1183525260} }
Lima, Elon L. Commuting vector fields on 2-manifolds. Bull. Amer. Math. Soc., Tome 69 (1963) no. 4, pp. 366-368. http://gdmltest.u-ga.fr/item/1183525260/