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Lefort, Jean, "Les séries divergentes chez Euler"(PDF), L'Ouvert (in French) (31), IREM de Strasbourg: 15–25, archived from the original(PDF) on February 22, 2014, retrieved February 14, 2014.
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Lefort, Jean, "Les séries divergentes chez Euler"(PDF), L'Ouvert (in French) (31), IREM de Strasbourg: 15–25, archived from the original(PDF) on February 22, 2014, retrieved February 14, 2014.