@article{PMIHES_1988__68__27_0,
     author = {Gromov, Michael and Lawson, H. B. Jr. and Thurston, W.},
     title = {Hyperbolic 4-manifolds and conformally flat 3-manifolds},
     journal = {Publications Math\'ematiques de l'IH\'ES},
     pages = {27--45},
     publisher = {Institut des Hautes \'Etudes Scientifiques},
     volume = {68},
     year = {1988},
     mrnumber = {1001446},
     zbl = {0692.57012},
     language = {en},
     url = {http://www.numdam.org/item/PMIHES_1988__68__27_0/}
}