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Greub, Christoph; Neubert, M.; Pecjak, B.D. (2009). NNLO corrections to B --> X_u l nu and the determination of |V_ub|. European physical journal. C - particles and fields, 65(3-4), pp. 501-515. Les Ulis (F): EDP Sciences 10.1140/epjc/s10052-009-1210-0
