@article{02237563, title = {An equivalent flat condition.}, journal = {Sibirskij Matematicheskij Zhurnal}, volume = {44}, year = {2003}, pages = {1046-1050}, zbl = {1080.53028}, language = {en}, url = {http://dml.mathdoc.fr/item/02237563} }
Kim, Hobum; Kim, Jaeman. An equivalent flat condition.. Sibirskij Matematicheskij Zhurnal, Tome 44 (2003) pp. 1046-1050. http://gdmltest.u-ga.fr/item/02237563/