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Asatrian, Hrachia M.; Ewerth, Thorsten; Ferroglia, Andrea; Greub, Christoph; Ossola, Giovanni (2010). Complete (O_7,O_8) contribution to B -> X_s gamma at order alpha_s^2. Physical review. D - particles, fields, gravitation, and cosmology, 82(7), p. 74006. Melville, N.Y.: American Physical Society 10.1103/PhysRevD.82.074006
