@Misc{ BarJev20a, author = { Bartolucci, Daniele and Jevnikar, Aleks }, title = { New universal estimates for free boundary problems arising in plasma physics }, journal = { Proc. Amer. Math. Soc. }, year = { 2021 }, pages = { }, URL = { http://cvgmt.sns.it/paper/4727/ }, note = { cvgmt preprint} }