@article{MS2_1961__9_165771,
     author = {Sigurdur Helgason},
     title = {Some {Remarks} on the {Exponential} {Mapping} for an {Affine} {Connection.}},
     journal = {Mathematica Scandinavica},
     pages = {129--146},
     publisher = {mathdoc},
     volume = {9},
     year = {1961},
     zbl = {0101.14305},
     url = {http://geodesic.mathdoc.fr/item/MS2_1961__9_165771/}
}