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WikiPedia: Carl_Gustav_Jakob_Jacobi http://cantic.bnc.cat/registres/CUCId/a1143269x http://data.bibliotheken.nl/id/thes/p073133566 http://www-history.mcs.st-andrews.ac.uk/Biographie... https://nla.gov.au/anbd.aut-an35429574 https://trove.nla.gov.au/people/949772 https://aleph.nkp.cz/F/?func=find-c&local_base=aut... https://genealogy.math.ndsu.nodak.edu/id.php?id=15... https://catalogue.bnf.fr/ark:/12148/cb122025359 https://data.bnf.fr/ark:/12148/cb122025359 https://www.idref.fr/030651506