@article {GianiGrubisicHeltai-2021-a, title = {Smoothed-adaptive perturbed inverse iteration for elliptic eigenvalue problems}, journal = {Computational Methods in Applied Mathematics}, volume = {21}, number = {2}, year = {2021}, pages = {385-405}, author = {Stefano Giani and Luka Grubisic and Luca Heltai and Ornela Mulita} }