%0 Journal Article %A Al-Bassam, M.A. %T On the existence of series solution of differential equations of generalized order %J Portugaliae mathematica %D 1970 %P 5-11 %V 29 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/PORMA_1970__29_1_115103/ %G en %F PORMA_1970__29_1_115103