@article{IM_1980__57_142711,
     author = {Steve Bell and Ewa Ligocka},
     title = {A {Simplification} and {Extension} of {Fefferman's} {Theorem} on {Biholomorphic} {Mappings.}},
     journal = {Inventiones mathematicae},
     pages = {283--289},
     publisher = {mathdoc},
     volume = {57},
     year = {1980},
     zbl = {0411.32010},
     url = {http://geodesic.mathdoc.fr/item/IM_1980__57_142711/}
}