For a super-polyharmonic function $u$ on the unit ball satisfying a growth condition on spherical means, we study a growth property of the Riesz measure of $u$ near the boundary.
"Spherical means of super-polyharmonic functions in the unit ball." Hiroshima Math. J. 44 (2) 235 - 245, July 2014. https://doi.org/10.32917/hmj/1408972910