@article{1178225112, author = {Geiges, Hansj\"org}, title = {Normal contact structures on $3$-manifolds}, journal = {Tohoku Math. J. (2)}, volume = {49}, number = {3}, year = {1997}, pages = { 415-422}, language = {en}, url = {http://dml.mathdoc.fr/item/1178225112} }
Geiges, Hansjörg. Normal contact structures on $3$-manifolds. Tohoku Math. J. (2), Tome 49 (1997) no. 3, pp. 415-422. http://gdmltest.u-ga.fr/item/1178225112/