@article{10_4153_S0008414X23000846, author = {Cavagnari, Giulia and Savar\'e, Giuseppe and Sodini, Giacomo Enrico}, title = {Extension of monotone operators and {Lipschitz} maps invariant for a group of isometries}, journal = {Canadian journal of mathematics}, pages = {149--186}, year = {2025}, volume = {77}, number = {1}, doi = {10.4153/S0008414X23000846}, url = {http://geodesic.mathdoc.fr/articles/10.4153/S0008414X23000846/} }