Singular integral operators associated with measures of varying density

Let 1 < p < ∞ and let μ be a compactly supported regular Borel measure on ℝⁿ which has the property that there exists a t > 1 (p - 1) such that sup _0<r≤ ∫ _ℝn(μ(B(x,r))/r^p)^t dμ(x) < ∞. We show that, for such a μ, any singular integral operator on L ²(ℝⁿ, μ) with a smooth, homogeneous kernel of degree -1 belongs to the norm ideal C_p/(p-1)⁺.