We prove the C1,β-boundary regularity and a comparison principle for weak
solutions of the problem
 u − =p0 on u − λψp(u) = f (x) in , ∂,
where  is a bounded domain in RN, N > 1 with smooth boundary ∂, pu =
div(|∇u|p−2∇u), ψp(u) = |u|p−2u, p > 1, and f is allowed to be unbounded.

• A note on regularity of solutions for degenerate singular elliptic boundary value p