@article{articled20e2aff,
title   = {Global persistence of the unit eigenvectors of perturbed eigenvalue problems in Hilbert spaces},
author = {Benevieri, Pierluigi and Calamai, Alessandro and Furi, Massimo and Pera, Maria Patrizia},
year = {2020},
doi = {10.4171/ZAA/1669},
journal   = {Zeitschrift für Analysis und ihre Anwendungen}
}