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@article{MM2_1973__8_154129, author = {Klaus Bichteler}, title = {A {Weak} {Existence} {Theorem} and {Weak} {Permanence} {Properties} for {Strong} {Liftings.}}, journal = {Manuscripta mathematica}, pages = {1--10}, publisher = {mathdoc}, volume = {8}, year = {1973}, zbl = {0245.46062}, url = {http://geodesic.mathdoc.fr/item/MM2_1973__8_154129/} }
Klaus Bichteler. A Weak Existence Theorem and Weak Permanence Properties for Strong Liftings.. Manuscripta mathematica, Tome 8 (1973), pp. 1-10. http://geodesic.mathdoc.fr/item/MM2_1973__8_154129/