@article{1092749570, author = {Kogan , Mikhail}, title = {Existence of perfect Morse functions of spaces with semi-free circle action}, journal = {J. Symplectic Geom.}, volume = {1}, number = {2}, year = {2002}, pages = { 829-850}, language = {en}, url = {http://dml.mathdoc.fr/item/1092749570} }
Kogan , Mikhail. Existence of perfect Morse functions of spaces with semi-free circle action. J. Symplectic Geom., Tome 1 (2002) no. 2, pp. 829-850. http://gdmltest.u-ga.fr/item/1092749570/