1. A. K. Dibrova and S. P. Papkov, in Summarized Information of VNIIV (NIITEKhim, Moscow, 1971).
2. A. K. Dibrova and S. P. Papkov, in Summarized Information of VNIIV (NIITEKhim, Moscow, 1972).
3. S. P. Papkov and V. G. Kulichikhin, Khim. Volokna, No. 2, 29 (1981).
4. A. P. Kreshkov, Analytical Chemistry of Nonaqueous Solutions (Khimiya, Moscow, 1982) [in Russian].
5. A. K. Dibrova and L. V. Petrova, in Summarized Information of VNIIVproject (NIITEKhim, Moscow, 1984).