1. B. I. Peschevitsky andV. P. Kazakov, Izv. Sib. Otd. Akad. Nauk. SSSR, Ser. Khim., No. 7, Issue 2 (1963) 20.
2. M. M. Pavlyuchenko, E. A. Prodan andS. A. Slyshkina, Dokl. AN SSSR, 181 (1968) 1174.
3. B. I. Peshchevitsky andS. P. Khranenko, Izv. Sib. Otd. Akad. Nauk. SSSR, Ser. Khim. No. 2, Issue 1 (1972) 18.
4. T. V. Meshcheryakova andN. D. Topor, Vestn. Mosk. Gos. Univ., Khimiya, No. 3 (1967) 73.
5. H. H. Horowitz andG. Metzger, Anal. Chem., 35 (1963) 1964.