@article{GDZPPN002233177, title = {Instrinsic Connections for Levi Metrics.}, journal = {Manuscripta mathematica}, volume = {76}, year = {1992}, pages = {349-364}, url = {http://dml.mathdoc.fr/item/GDZPPN002233177} }
Stanton, Charles M. Instrinsic Connections for Levi Metrics.. Manuscripta mathematica, Tome 76 (1992) pp. 349-364. http://gdmltest.u-ga.fr/item/GDZPPN002233177/