@article{g2023, author = {D. Gallistl}, title = {Mixed methods and lower eigenvalue bounds}, year = {2023}, preprint = {download.php?Down=pdf/2022-g-mevp.pdf}, journal = {Math. Comp.}, volume = {92}, number = {342}, pages = {1491--1509}, doi = {https://doi.org/10.1090/mcom/3820}, }