%0 Journal Article %A Hamed Aslani %A Davod Khojasteh Salkuyeh %A Fatemeh Panjeh Ali Beik %T On the preconditioning of three-by-three block saddle point problems %J Filomat %D 2021 %P 5181 %V 35 %N 15 %U http://geodesic.mathdoc.fr/articles/10.2298/FIL2115181A/ %R 10.2298/FIL2115181A %G en %F 10_2298_FIL2115181A