@article{AIHPA_1972__17_4_337_0,
     author = {K\"unzle, H. P.},
     title = {Galilei and {Lorentz} structures on space-time : comparison of the corresponding geometry and physics},
     journal = {Annales de l'institut Henri Poincar\'e. Section A, Physique Th\'eorique},
     pages = {337--362},
     publisher = {Gauthier-Villars},
     volume = {17},
     number = {4},
     year = {1972},
     mrnumber = {334831},
     language = {en},
     url = {http://www.numdam.org/item/AIHPA_1972__17_4_337_0/}
}