@article{1270129456, author = {HATTORI, Akio}, title = {Symplectic Manifolds with Semi-Free Hamiltonian $S^1$-Action}, journal = {Tokyo J. of Math.}, volume = {15}, number = {2}, year = {1992}, pages = { 281-296}, language = {en}, url = {http://dml.mathdoc.fr/item/1270129456} }
HATTORI, Akio. Symplectic Manifolds with Semi-Free Hamiltonian $S^1$-Action. Tokyo J. of Math., Tome 15 (1992) no. 2, pp. 281-296. http://gdmltest.u-ga.fr/item/1270129456/