@article{MZ_1939__45_168842,
     author = {F., Klein-Barmen},
     title = {Theorie der {Gewebe}},
     journal = {Mathematische Zeitschrift},
     pages = {107--126},
     publisher = {mathdoc},
     volume = {45},
     year = {1939},
     zbl = {65.0083.01},
     url = {http://geodesic.mathdoc.fr/item/MZ_1939__45_168842/}
}