@article{IM2_1984_22_3_a0,
     author = {Yu. I. Volkov},
     title = {Multidimensional approximation operators generated by {Lebesgue{\textendash}Stieltjes} measures},
     journal = {Izvestiya. Mathematics},
     pages = {399--418},
     year = {1984},
     volume = {22},
     number = {3},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1984_22_3_a0/}
}