TY - JOUR AU - Apostolos Hadjidimos TI - Extrapolated alternating direction implicit methods for solving the biharmonic equation in three space variables JO - Δελτίο της Ελληνικής Μαθηματικής Εταιρίας PY - 1971 SP - 138 EP - 153 VL - 12 IS - A UR - http://geodesic.mathdoc.fr/item/DEME_1971_12_A_a12/ LA - gr ID - DEME_1971_12_A_a12 ER -