@article{DAN_1961_141_5_a5,
     author = {D. V. Ionescu},
     title = {Representation as a double integral of the divided difference of order $(m,n)$ of a function of two {variables.~I}},
     journal = {Doklady Akademii Nauk},
     pages = {1026--1029},
     publisher = {mathdoc},
     volume = {141},
     number = {5},
     year = {1961},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1961_141_5_a5/}
}