%0 Journal Article %A H. Omori %T Introduction to noncommutative differential geometry %J Lobachevskii journal of mathematics %D 1999 %P 13-46 %V 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/LJM_1999_4_a1/ %G en %F LJM_1999_4_a1