@article{GDZPPN002097303,
title = {Orientation Reversing Morse-Smale Diffeomorphisms of S2.},
journal = {Inventiones mathematicae},
volume = {64},
year = {1981},
pages = {345-356},
zbl = {0481.58021},
url = {http://dml.mathdoc.fr/item/GDZPPN002097303}
}
Batterson, S.; Handel, M.; Narasimhan, C. Orientation Reversing Morse-Smale Diffeomorphisms of S2.. Inventiones mathematicae, Tome 64 (1981) pp. 345-356. http://gdmltest.u-ga.fr/item/GDZPPN002097303/