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Asatrian, Hrachia; Greub, Christoph; Pecjak, Ben D. (2008). Next-to-next-to-leading order corrections to B¯¯¯→Xuℓν¯ in the shape-function region. Physical review. D - particles, fields, gravitation, and cosmology, 78(11), p. 114028. Melville, N.Y.: American Physical Society 10.1103/PhysRevD.78.114028