@article{GDZPPN002434040,
title = {On the Curvature of CR-Structures and its Covariant Derivatives.},
journal = {Mathematische Zeitschrift},
volume = {194},
year = {1987},
pages = {203-210},
url = {http://dml.mathdoc.fr/item/GDZPPN002434040}
}
Cheng, Jih-Hsin. On the Curvature of CR-Structures and its Covariant Derivatives.. Mathematische Zeitschrift, Tome 194 (1987) pp. 203-210. http://gdmltest.u-ga.fr/item/GDZPPN002434040/