@article{01014294, title = {On differential bases formed of intervals.}, journal = {Georgian Mathematical Journal}, volume = {4}, year = {1997}, pages = {81-100}, doi = {10.1023/A:1022117015291}, zbl = {0892.28004}, language = {en}, url = {http://dml.mathdoc.fr/item/01014294} }
Oniani, G.; Zerekidze, T. On differential bases formed of intervals.. Georgian Mathematical Journal, Tome 4 (1997) pp. 81-100. doi : 10.1023/A:1022117015291. http://gdmltest.u-ga.fr/item/01014294/