@article{JRAM_1996__481_153877,
     author = {Konstantin Athanassopoulos},
     title = {Flows with cyclic winding numbers groups.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {207--215},
     publisher = {mathdoc},
     volume = {481},
     year = {1996},
     zbl = {0858.58041},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1996__481_153877/}
}