@article{PA_2019_8_2_a0,
     author = {George A. Anastassiou},
     title = {Multivariate {Iyengar} type inequalities for radial functions},
     journal = {Problemy analiza},
     pages = {3--27},
     publisher = {mathdoc},
     volume = {8},
     number = {2},
     year = {2019},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PA_2019_8_2_a0/}
}