Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{MZ_1936__40_168628, author = {W. Haack}, title = {Differentialgeometrie der {Strahenkomplex} {I}}, journal = {Mathematische Zeitschrift}, pages = {560--581}, publisher = {mathdoc}, volume = {40}, year = {1936}, zbl = {0012.31402}, url = {http://geodesic.mathdoc.fr/item/MZ_1936__40_168628/} }
W. Haack. Differentialgeometrie der Strahenkomplex I. Mathematische Zeitschrift, Tome 40 (1936), pp. 560-581. http://geodesic.mathdoc.fr/item/MZ_1936__40_168628/