%0 Journal Article %A A. W. Niukkanen %T Extending the factorization principle to hypergeometric series of general form %J Matematičeskie zametki %D 2000 %P 573-581 %V 67 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZM_2000_67_4_a10/ %G ru %F MZM_2000_67_4_a10