@article{10_4153_CMB_1995_016_8,
     author = {Schwartzman, Sol},
     title = {Periodic {Orbits} for {Generalized} {Gradient} {Flows}},
     journal = {Canadian mathematical bulletin},
     pages = {117--119},
     year = {1995},
     volume = {38},
     number = {1},
     doi = {10.4153/CMB-1995-016-8},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1995-016-8/}
}