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@article{MZ_1987__196_173875, author = {Jih-Hsin Cheng}, title = {On the {Curvature} of {CR-Structures} and its {Covariant} {Derivatives.}}, journal = {Mathematische Zeitschrift}, pages = {203--210}, publisher = {mathdoc}, volume = {196}, year = {1987}, url = {http://geodesic.mathdoc.fr/item/MZ_1987__196_173875/} }
Jih-Hsin Cheng. On the Curvature of CR-Structures and its Covariant Derivatives.. Mathematische Zeitschrift, Tome 196 (1987), pp. 203-210. http://geodesic.mathdoc.fr/item/MZ_1987__196_173875/