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Full text from AIR - Univ. Milan free resource Archivio Istituzionale della Ricerca Unimi https://air.unimi.it/handle/2434/661644
subscription/membership/fee required American Physical Society https://link.aps.org/abstract/PRL/v122/p191804
Full text from free resource Institutional Repository of University of Modena and Reggio Emilia (IRIS UNIMORE) https://iris.unimore.it/retrieve/handle/11380/1209989/546525/VOR_Observation%20of%20B%20(s)0%20%BFj%BFp%20p%20Decays%20and%20Precision%20Measurements%20of%20the%20B%20(s)0%20Masses.pdf