1. Investigations of Oils and Petroleum Products. Collected Works, Ed. by L. A. Potolovskii (Gostoptekhizdat, Moscow, 1955), p. 264 [in Russian].
2. A. K. Dmitriev, Zh. Obshch. Khimii 18(7), 1267 (1948).
3. F. P. Treadwell, Tables for Qualitative Analysis (Gos. Izd-vo, Moscow/Leningrad, 1930) [in Russian].
4. G. M. Gusev, in Mechanochemical Phenomena in Ultrafine Milling. Collected Works, Ed. by V. M. Klyarovskii and V. I. Molchanov (Nauka, Novosibirsk, 1971), p. 110 [in Russian].
5. F. C. Thompson and N. Tilling, J. Soc. Chem. Ind. 43(9), 37 (1924).