Suworow et al.
Zhurnal Obshchei Khimii, 1959 , vol. 29, p. 979,981; engl. Ausg. S. 962, 963
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Suworow; Sorokina
Zhurnal Obshchei Khimii, 1960 , vol. 30, p. 2055,2058
J. Gen. Chem. USSR (Engl. Transl.), 1960 , vol. 30, p. 2036,2038

Suvorov, N. N.; Shkil'kova, V. N.; Podkhalyuzina N. Ya.
Journal of Organic Chemistry USSR (English Translation), 1981 , vol. 17, # 4 p. 649 - 652
Zhurnal Organicheskoi Khimii, 1981 , vol. 17, # 4 p. 745 - 748

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Justus Liebigs Annalen der Chemie, 1886 , vol. 236, p. 158