@article{GDZPPN002317427, title = {A Direct Extension Method for CR Structures.}, journal = {Mathematische Annalen}, volume = {243}, year = {1979}, pages = {1-20}, zbl = {0386.53026}, url = {http://dml.mathdoc.fr/item/GDZPPN002317427} }
Kiremidjian, Garo K. A Direct Extension Method for CR Structures.. Mathematische Annalen, Tome 243 (1979) pp. 1-20. http://gdmltest.u-ga.fr/item/GDZPPN002317427/