1. V. L. Afanas'eva, A. V. Lyubeshkin, S. S. Kovaleva, et al., Khim.-farm. Zh., No. 1, 1367–1371 (1987).
2. V. L. Afanas'eva, L. V. Vlasenko, S. S. Kovaleva, and Yu. V. Erofeev, Catalysis and Catalytic Processes of Chemical Pharmaceutical Production [in Russian], Part 2, Moscow (1989), pp. 45–46.
3. K. M. Dyumaev and I. S. Belostotskaya, Zh. Obshch. Khim.,32, 2661–2663 (1962).
4. O. A. Ermakov, Khim. Prom., No. 2, 93–95 (1989).
5. G. F. Zakis and B. Ya. Neiberte, Khim. Drevesini, No. 5, 76–80 (1985).