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2. Sur le bromure de difluoréthyle et l'acide tétrafluordiéthyl-phosphorique
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4. THE PREPARATION OF 1,1-DI-H-HEPTAFLUOROBUTYL IODIDE AND 1,1-DI-H-HEPTAFLUOROBUTYL BROMIDE AND THEIR INTERMEDIATES
5. V.S. Chuganov, E.V. Sapgir, Zh. Obshch. Khim. 38 (1968) 412 (English Translation).