@article{MZ_1958__69_169745,
     author = {Dieter Puppe},
     title = {Homotopiemengen und ihre induzierten {Abbildungen.} {I.}},
     journal = {Mathematische Zeitschrift},
     pages = {299--344},
     publisher = {mathdoc},
     volume = {69},
     year = {1958},
     zbl = {0092.39803},
     url = {http://geodesic.mathdoc.fr/item/MZ_1958__69_169745/}
}