@article{01949146,
title = {On multidimensional Ostrowski and Gr\"uss type finite difference inequalities.},
journal = {JIPAM. Journal of Inequalities in Pure \& Applied Mathematics [electronic only]},
volume = {4},
year = {2003},
zbl = {1034.26022},
language = {en},
url = {http://dml.mathdoc.fr/item/01949146}
}
Pachpatte, B. G. On multidimensional Ostrowski and Grüss type finite difference inequalities.. JIPAM. Journal of Inequalities in Pure & Applied Mathematics [electronic only], Tome 4 (2003) . http://gdmltest.u-ga.fr/item/01949146/