@article{MM2_1984__49_155033,
     author = {Helmut Weberpals},
     title = {Vertauschbarkeit von {Limites} und {Colimites.}},
     journal = {Manuscripta mathematica},
     pages = {9--26},
     year = {1984},
     volume = {49},
     zbl = {0554.18001},
     url = {http://geodesic.mathdoc.fr/item/MM2_1984__49_155033/}
}