@article{MM2_1998__95_3_156390,
     author = {Qing-Ming Cheng and Susumu Ishikawa},
     title = {Spacelike hypersurfaces with constant scalar curvature.},
     journal = {Manuscripta mathematica},
     pages = {499--506},
     publisher = {mathdoc},
     volume = {95},
     number = {3},
     year = {1998},
     zbl = {0913.53022},
     url = {http://geodesic.mathdoc.fr/item/MM2_1998__95_3_156390/}
}