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Cousin Chem. Zentralbl., 1899 , vol. 70, # I p. 877 Full Text Show Details Reverdin; Crepieux Chemische Berichte, 1903 , vol. 36, p. 2257 Chemische Berichte, 1906 , vol. 39, p. 4232 Full Text Show Details Meldola P. Ch. S., p. 167