Nicolas Crampé 1, 2
Correspondent author Employer institution : Centre National de la Recherche Scientifique IdHAL : nicolas-crampe arXiv : https://arxiv.org/a/crampe1977@gmail.com IdRef : https://www.idref.fr/087485680 ORCID : https://orcid.org/0000-0002-3754-4074
Eric Ragoucy 3
Correspondent author
Luc Vinet 2
Correspondent author
Alexei Zhedanov 4
Correspondent author
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