1. G. V. Pokhvisneva and O. A. Luk’yanov, Izv. Akad. Nauk, Ser. Khim., 2000, 896 [Russ. Chem. Bull., Int. Ed., 2000, 49, 894].
2. A. E. Kretov and M. M. Kremlev, Ukr. Khim. Zh. [Ukr. Chem. J.], 1959, 25, 482 (in Russian).
3. V. L. Dubina, L. I. Shebitchenko, and G. I. Belov, Vopr. Khim. Khim. Tekhnol., 1983, 72, 79 (in Russian).
4. A. E. Kretov, Ukr. Khim. Zh. [Ukr. Chem. J.], 1957, 23, 344 (in Russian).
5. A. V. Kirsanov and N. A. Kirsanova, Zh. Obshch. Khim., 1962, 32, 887 [J. Gen. Chem. USSR, 1962, 32 (Engl. Transl.)].