@article{etna_vol53_pp541-561, author = {Andreas Frommer and Brigit Jacob and Kartsen Kahl and Christian Wyss and Ian Zwaan}, title = {Krylov type methods for linear systems exploiting properties of the quadratic numerical range}, journal = {Electron. Trans. Numer. Anal.}, volume = {53}, year = {2020}, pages = {541--561}, doi = {10.1553/etna_vol53s541}, }