@article{article09fbdac7,
title   = {A group theoretic proof of a compactness lemma and existence of nonradial solutions for semilinear elliptic equations},
author = {Biliotti, Leonardo and Siciliano, Gaetano},
year = {2021},
doi = {10.1007/s10231-020-01016-y},
journal   = {Annali di Matematica Pura ed Applicata}
}