%0 Journal Article %A Apostolos Hadjidimos %T Extrapolated alternating direction implicit methods for solving the biharmonic equation in three space variables %J Δελτίο της Ελληνικής Μαθηματικής Εταιρίας %D 1971 %P 138-153 %V 12 %N A %U http://geodesic.mathdoc.fr/item/DEME_1971_12_A_a12/ %G gr %F DEME_1971_12_A_a12