1. S. Miyazaki, Y. Suhara:J. Am. Oil. Chem. Soc. 55, 536 (1978).
2. W. Ando, I. Nakaoka:Ger. Offen. DE 2826065, 11 January, 1979.
3. A. Kimura, B. Miya:Jpn. Kokai Tokkyo Koho, JP 53135919, 28 November, 1978.
4. N.N. Tsekhina, B.G. Freidin, I.G. Uryukina:Neftekhimiya,24, 63 (1984).
5. I.V. Rudik, I.A. Avrutskaya:Zh. Prikl. Khim. (Leningrad),61, 1334 (1988).