M. Bayrami-Aminlouee, M. Fotouhi:
Regularity in the two-phase Bernoulli problem for the $p$-Laplace
  operator
(preprint) 2023

M. Bayrami-Aminlouee, M. Fotouhi:
Global minimizers of the two-phase Bernoulli problem with the
  $p$-Laplace operator
(preprint) 2023