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Walter,W.; Maerten,G. Justus Liebigs Annalen der Chemie, 1968 , vol. 712, p. 58 - 66 Full Text Show Details Emmons Journal of the American Chemical Society, 1957 , vol. 79, p. 5739,5749 Full Text Show Details Logemann; Artini Chemische Berichte, 1958 , vol. 91, p. 2574,2577