@article{etna_vol43_pp70-89, author = {Paraskevi Fika and Marilena Mitrouli and Paraskevi Roupa}, title = {Estimates for the bilinear form $x^T A^{-1} y$ with applications to linear algebra problems}, journal = {Electron. Trans. Numer. Anal.}, volume = {43}, year = {2014-2015}, pages = {70--89}, }