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Both authors belong to the group GNSAGA of CNR
This work has been done during the last author was a guest at the Forschungsinstitut fur Mathematik (ETH Zürich) and at the University of Rome
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Abeasis, S., Del Fra, A. & Kraft, H. The geometry of representations ofA m . Math. Ann. 256, 401–418 (1981). https://doi.org/10.1007/BF01679706
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DOI: https://doi.org/10.1007/BF01679706