Barnett; Matthews
Chem. News J. Ind. Sci., 1925 , vol. 130, p. 339
Chem. Zentralbl., 1925 , vol. 96, # II p. 562

Cook; Robinson; Goulden
Journal of the Chemical Society, 1937 , p. 393,395
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Fieser; Hershberg
Journal of the American Chemical Society, 1939 , vol. 61, p. 1272,1278
Journal of the American Chemical Society, 1940 , vol. 62, p. 49,51

Fieser; Hershberg
Journal of the American Chemical Society, 1937 , vol. 59, p. 1028,1032