@article{DAN_1963_150_6_a1,
     author = {Z. H. Van},
     title = {The approximation of unbounded functions by modified {Landau} and {Bernstein} polynomials over the entire plane},
     journal = {Doklady Akademii Nauk},
     pages = {1195--1197},
     publisher = {mathdoc},
     volume = {150},
     number = {6},
     year = {1963},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1963_150_6_a1/}
}