@article{JDM_1910__19_145244,
     author = {Beppo Levi},
     title = {Sui postulati della metrica generale projettiva.},
     journal = {Jahresbericht der Deutschen Mathematiker-Vereinigung},
     pages = {300--306},
     publisher = {mathdoc},
     volume = {19},
     year = {1910},
     zbl = {41.0535.03},
     url = {http://geodesic.mathdoc.fr/item/JDM_1910__19_145244/}
}