1. T. Kauffmann and W. Schoeneck, Angew. Chem., 71, 285 (1959).
2. A. F. Pozharskii and A. M. Simonov, Chichibabin Amination of Heterocycles [in Russian], Izd. Rostovsk. Univ., Rostov-on-Don (1971).
3. V. G. Kartsev, Master's Dissertation, Moscow State University (1975).
4. A. N. Kost, P. B. Terent'ev, V. G. Kartsev, and M. F. Budyka, USSR Inventor's Certificate No. 533594 (1975);
5. Byul. Izobr., No. 40, 63 (1976).