@article{MAN_1907__63_158293,
     author = {Stanislaus Jolles},
     title = {Die {Fokaltheorie} der linearen {Strahlenkongruenzen}},
     journal = {Mathematische Annalen},
     pages = {337--386},
     year = {1907},
     volume = {63},
     zbl = {38.0580.02},
     url = {http://geodesic.mathdoc.fr/item/MAN_1907__63_158293/}
}