A universal sum rule for hadronic elastic scattering with applications to the Tevatron, RHIC and LHC G. Pancheri, Y. Srivastava and N. Staffolani Eur. Phys. J. C, 42 3 (2005) 303-308 Published online: 15 August 2005 DOI: 10.1140/epjc/s2005-02288-7