%0 Journal Article %A F. M. Ragab %T Expansions into double Kamp\'e de F\'eriet hypergeometric functions of higher orders %J Doklady Akademii Nauk %D 1964 %P 519-521 %V 159 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1964_159_3_a11/ %G ru %F DAN_1964_159_3_a11