On the Sum Rule Approach to Quarkonium-Hadron Interactions
  We extend a recent sum rule calculation for inelastic quarkonium-hadron interactions to realistic parton distribution functions; we also include finite target-mass corrections. Both modifications are shown to have no significant effect on the resulting cross section behaviour but the performed analysis gives useful insights on the sum-rule approach in general. 
D. Kharzeev, H. Satz, A. Syamtomov and G. Zinovjev