@article{CRMATH_2018__356_6_696_0,
     author = {Bakhta, Athmane and Lombardi, Damiano},
     title = {An a posteriori error estimator based on shifts for positive {Hermitian} eigenvalue problems},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {696--705},
     year = {2018},
     publisher = {Elsevier},
     volume = {356},
     number = {6},
     doi = {10.1016/j.crma.2018.04.017},
     language = {en},
     url = {https://www.numdam.org/articles/10.1016/j.crma.2018.04.017/}
}