@article{MZ_1926__25_167906,
     author = {T.Y. Thomas},
     title = {A projective theorie of affinely connected manifolds},
     journal = {Mathematische Zeitschrift},
     pages = {723--733},
     year = {1926},
     volume = {25},
     zbl = {52.0732.02},
     url = {http://geodesic.mathdoc.fr/item/MZ_1926__25_167906/}
}