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How many υ are there?

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Lettere al Nuovo Cimento (1971-1985)

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References

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Work supported in part by the National Research Council (Canada).

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Kalman, C.S. How many υ are there?. Lett. Nuovo Cimento 21, 145–147 (1978). https://doi.org/10.1007/BF02762900

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