Schwenk; Schubert; Stahl
Archives of Biochemistry, 1949 , vol. 20, p. 220,226

Wang et al.
Sci. Technol. China, 1949 , vol. 2, p. 83,86

Hetherington; Raistrick
Philosophical Transactions of the Royal Society of London, 1931 , vol. <B> 220, p. 269,278
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Gore et al.
Proceedings - Indian Academy of Sciences, Section A, 1949 , # 29 p. 289,294, 300
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Brown et al.
Journal of the Chemical Society, 1949 , p. 859,866
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Cram
Journal of the American Chemical Society, 1948 , vol. 70, p. 4244,4247
Journal of the American Chemical Society, 1949 , vol. 71, p. 3887