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Instability of invariance groups of space-time, group contractions and models of universe

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Lettere al Nuovo Cimento (1971-1985)

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Mignani, R. Instability of invariance groups of space-time, group contractions and models of universe. Lett. Nuovo Cimento 23, 349–352 (1978). https://doi.org/10.1007/BF02824482

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