@misc{MZ_1924__21_167821,
     title = {Friedmann, {A.,} und {J.} {A.} {Schouten,} {\"Uber} die {Geometrie} der halbsymmetrischen {\"Ubertragungen}},
     journal = {Mathematische Zeitschrift},
     pages = {211--223},
     publisher = {mathdoc},
     volume = {21},
     year = {1924},
     zbl = {50.0505.03},
     url = {http://geodesic.mathdoc.fr/item/MZ_1924__21_167821/}
}