Guthrie, J. Peter; Cossar, John
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Saito,I. et al.
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v. Auwers; Ludewig; Mueller
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Rabe
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Boggs, Roger A.; Hasan, Fariza B.; Mahoney, J. Barry; Mehta, Avi C.; Palumbo, Catherine M. K.; et al.
Journal of the Chemical Society, Perkin Transactions 2: Physical Organic Chemistry (1972-1999), 1992 , # 8 p. 1271 - 1277

v. Auwers; Ludewig; Mueller
Justus Liebigs Annalen der Chemie, 1936 , vol. 526, p. 143,170
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Hey
Journal of the Chemical Society, 1930 , p. 1232
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Bretschneider
Monatshefte fuer Chemie, 1948 , vol. 78, p. 117,126
Monatshefte fuer Chemie, 1947 , vol. 76, p. 355,364

Guthrie, J. Peter; Cossar, John
Canadian Journal of Chemistry, 1990 , vol. 68, # 11 p. 2060 - 2069

Hey
Journal of the Chemical Society, 1930 , p. 1232