@article{article5d379877,
title   = {Optimization of the first Dirichlet laplacian eigenvalue with respect to a union of balls},
author = {Birgin, Ernesto Julian Goldberg and Fernandez, Lucas dos Santos and Haeser, Gabriel and Laurain, Antoine},
year = {2023},
doi = {10.1007/s12220-023-01241-w},
journal   = {The Journal of Geometric Analysis}
}