@article{VMUMM_1994_6_a3,
     author = {M. A. Vorob'eva},
     title = {On theorems of {Jackson} and {Bernstein} type for continuous functions in the plane that are approximated by {Newton} potentials},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {14--18},
     publisher = {mathdoc},
     number = {6},
     year = {1994},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1994_6_a3/}
}