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D0 Colalboration, ; Weber, Michele (2012). Measurement of the CP-violating phase ϕJ/ψϕs using the flavor-tagged decay B0s→J/ψϕ in 8 fb−1 of pp¯ collisions. Physical review. D - particles, fields, gravitation, and cosmology, 85(3), p. 32006. Melville, N.Y.: American Physical Society 10.1103/PhysRevD.85.032006