@article{01139489, title = {<title-group xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"><article-title xml:lang="en"><math><mi>O</mi></math>-regularly varying functions in approximation theory.</article-title></title-group>}, journal = {Journal of Inequalities and Applications [electronic only]}, volume = {1}, year = {1997}, pages = {253-274}, doi = {10.1155/S1025583497000179}, zbl = {0898.26002}, language = {en}, url = {http://dml.mathdoc.fr/item/01139489} }
Jansche, Stefan.. Journal of Inequalities and Applications [electronic only], Tome 1 (1997) pp. 253-274. doi : 10.1155/S1025583497000179. http://gdmltest.u-ga.fr/item/01139489/ -regularly varying functions in approximation theory.