1. L. Reichl and F. Billet, Ind. Eng. Chem.,57, No. 4, 52 (1965).
2. R. King, Brit. Chem. Eng.,12, No. 5, No. 10, 1599 (1967).
3. USSR Author's Certificate 203,621; Byul. Izobret., No. 21, 17 (1967).
4. R. Billet, Chem. Ingr. Tech.,42, No. 14, 910 (1970).
5. V. A. Malyusov, Author's Abstract of Doctoral Dissertation [in Russian], L. Ya. Karpov Physicochemical Institute (1962).