@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/