@article{1183523587, author = {Beck, Anatole}, title = {Continuous flows with closed orbits}, journal = {Bull. Amer. Math. Soc.}, volume = {66}, number = {6}, year = {1960}, pages = { 305-307}, language = {en}, url = {http://dml.mathdoc.fr/item/1183523587} }
Beck, Anatole. Continuous flows with closed orbits. Bull. Amer. Math. Soc., Tome 66 (1960) no. 6, pp. 305-307. http://gdmltest.u-ga.fr/item/1183523587/