Generalized condensers and conformal properties of riemannian manifolds with at least two ends Jacqueline Ferrand (1998/1999) Séminaire de théorie spectrale et géométrie
Gradient potential estimates Giuseppe Mingione (2011) Journal of the European Mathematical Society Pointwise gradient bounds via Riesz potentials like those available for the Poisson equation actually hold for general quasilinear equations.
Growth properties of spherical means for monotone BLD functions in the unit ball. Mizuta, Yoshihiro, Shimomura, Tetsu (2000) Annales Academiae Scientiarum Fennicae. Mathematica