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@article{MM2_1974__13_154251, author = {Ulrich Oppel}, title = {Zur {Existenz} projektiver {Limites} von {Vektormassen.}}, journal = {Manuscripta mathematica}, pages = {27--36}, publisher = {mathdoc}, volume = {13}, year = {1974}, zbl = {0292.28005}, url = {http://geodesic.mathdoc.fr/item/MM2_1974__13_154251/} }
Ulrich Oppel. Zur Existenz projektiver Limites von Vektormassen.. Manuscripta mathematica, Tome 13 (1974), pp. 27-36. http://geodesic.mathdoc.fr/item/MM2_1974__13_154251/