@article{AIHPA_1978__29_3_285_0,
     author = {von Westenholz, C.},
     title = {Topology of vortices},
     journal = {Annales de l'institut Henri Poincar\'e. Section A, Physique Th\'eorique},
     pages = {285--303},
     publisher = {Gauthier-Villars},
     volume = {29},
     number = {3},
     year = {1978},
     mrnumber = {519697},
     zbl = {0396.58010},
     language = {en},
     url = {http://www.numdam.org/item/AIHPA_1978__29_3_285_0/}
}