EN
Let $D_{j}$ be a bounded hyperconvex domain in $ℂ^{n_{j}}$ and set $D = D₁ ×⋯× D_{s}$, j=1,...,s, s ≥ 3. Also let $Ω_π$ be the image of D under the proper holomorphic map π. We characterize those continuous functions $f:∂Ω_π → ℝ$ that can be extended to a real-valued pluriharmonic function in $Ω_π$.