@article{1077375360, author = {Wu, Ta-Sun}, title = {Continuous flows with closed orbits}, journal = {Duke Math. J.}, volume = {31}, number = {1}, year = {1964}, pages = { 463-469}, language = {en}, url = {http://dml.mathdoc.fr/item/1077375360} }
Wu, Ta-Sun. Continuous flows with closed orbits. Duke Math. J., Tome 31 (1964) no. 1, pp. 463-469. http://gdmltest.u-ga.fr/item/1077375360/