@article{PIM_1976_N_S_20_34_a11,
     author = {Stanimir Fempl},
     title = {Eine {Geod\"atische} {Linie} {Auf} {Der} {Kegelfl\"ache}},
     journal = {Publications de l'Institut Math\'ematique},
     pages = {85 },
     publisher = {mathdoc},
     volume = {_N_S_20},
     number = {34},
     year = {1976},
     url = {http://geodesic.mathdoc.fr/item/PIM_1976_N_S_20_34_a11/}
}