@article {, title = {Exploiting Block Structures of KKT Matrices for Efficient Solution of Convex Optimization Problems}, journal = {IEEE Access}, year = {2021}, doi = {10.1109/ACCESS.2021.3106054}, author = {Iqbal, Zafar and Nooshabadi, Saeid and Yamazaki, Ichitaro and Stanimire Tomov and Jack Dongarra} }