@article{GDZPPN002085631, title = {CR structures and Fefferman's conformal structures.}, journal = {Forum mathematicum}, volume = {9}, year = {1997}, pages = {127-164}, zbl = {0876.53046}, url = {http://dml.mathdoc.fr/item/GDZPPN002085631} }
Kuranishi, Masatake. CR structures and Fefferman's conformal structures.. Forum mathematicum, Tome 9 (1997) pp. 127-164. http://gdmltest.u-ga.fr/item/GDZPPN002085631/