@article{AA_2002_14_3_a8,
     author = {A. V. Pajitnov},
     title = {On closed orbits of gradient flows for circle-valued mappings},
     journal = {Algebra i analiz},
     pages = {186--240},
     publisher = {mathdoc},
     volume = {14},
     number = {3},
     year = {2002},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AA_2002_14_3_a8/}
}