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Work supported in part by Banco Naoional de Desenvolvimento EconÔmico and Conselho Nacional de Pesquisas.
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Chanda, R. Leptons with hadronic core?. Lett. Nuovo Cimento 11, 593–595 (1974). https://doi.org/10.1007/BF02756636
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DOI: https://doi.org/10.1007/BF02756636