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Dolgii, I. E. Shapiro, E. A. Nefedov, O. M. Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1983 , vol. 32, # 10 p. 2168 - 2170 Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1983 , # 10 p. 2405 - 2408
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Akhachinskaya, T. V. Donskaya, N. A. Kalyakina, I. V. Oprunenko, Yu. F. Shabarov, Yu. S. Journal of Organic Chemistry USSR (English Translation), 1989 , vol. 25, # 8.1 p. 1485 - 1489 Zhurnal Organicheskoi Khimii, 1989 , vol. 25, # 8 p. 1645 - 1651