@article{MZ_1933__36_168384,
     author = {St. Jolles},
     title = {Die {Metrik} im polaren {F2-Geb\"usche} einer linearen {Strahlenkongruenz}},
     journal = {Mathematische Zeitschrift},
     pages = {35--98},
     publisher = {mathdoc},
     volume = {36},
     year = {1933},
     zbl = {0005.07409},
     url = {http://geodesic.mathdoc.fr/item/MZ_1933__36_168384/}
}