@article{IM_1989__96_1_143676,
     author = {Mark Spivakovsky},
     title = {A counterexample to the theorem of {Beppo} {Levi} in three dimensions.},
     journal = {Inventiones mathematicae},
     pages = {181--184},
     publisher = {mathdoc},
     volume = {96},
     number = {1},
     year = {1989},
     zbl = {0688.14012},
     url = {http://geodesic.mathdoc.fr/item/IM_1989__96_1_143676/}
}