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DASP-Proposal:Measurements of ψ decays and of inclusive leptons and hadron spectra.
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Genz, H. Remark concerning the isospin-violating decays of the ψ′(3.7). Lett. Nuovo Cimento 21, 270–276 (1978). https://doi.org/10.1007/BF02763084
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DOI: https://doi.org/10.1007/BF02763084