@article{CMH_1990__65_3_140181,
     author = {Bennett Palmer},
     title = {The {Gauss} map of a spacelike constant mean curvature hypersurface of {Minkowski} space.},
     journal = {Commentarii mathematici Helvetici},
     pages = {52--57},
     publisher = {mathdoc},
     volume = {65},
     number = {3},
     year = {1990},
     zbl = {0702.53008},
     url = {http://geodesic.mathdoc.fr/item/CMH_1990__65_3_140181/}
}