@article{etna_vol52_pp26-42, author = {Atika Archid and Abdeslem Hafid Bentbib and Said Agoujil}, title = {A block J-Lanczos method for Hamiltonian matrices}, journal = {Electron. Trans. Numer. Anal.}, volume = {52}, year = {2020}, pages = {26--42}, doi = {10.1553/etna_vol52s26}, }