@article{DAN_1963_150_3_a0,
     author = {E. A. Volkov},
     title = {On methods of refinement using higher-order differences and $h^2$-extrapolations},
     journal = {Doklady Akademii Nauk},
     pages = {455--458},
     publisher = {mathdoc},
     volume = {150},
     number = {3},
     year = {1963},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1963_150_3_a0/}
}