@article{IM_1970__11_142050,
     author = {Klaus Bichteler},
     title = {A {Reduction} of the {Strong} {Lifting} {Problem.}},
     journal = {Inventiones mathematicae},
     pages = {159--162},
     publisher = {mathdoc},
     volume = {11},
     year = {1970},
     zbl = {0211.15803},
     url = {http://geodesic.mathdoc.fr/item/IM_1970__11_142050/}
}