1. I. B. Starchenkov, V. G. Andrianov, and A. F. Mishnev,Khim. Geterotsikl. Soedin., No. 9, 1259 (1998).
2. I. B. Starchenkov, Candidate Dissertation in Chemical Sciences, Riga (1989).
3. I. B. Starchenkov and V. G. Andrianov,Khim. Geterotsikl. Soedin., No. 5, 717 (1996).
4. I. B. Starchenkov, V. G. Andrianov, and A. F. Mishnev,Khim. Geterotsikl. Soedin., No. 2, 250 (1997).
5. V. G. Andrianov, I. B. Starchenkov, and A. F. Mishnev,Khim. Geterotsikl. Soedin., No. 8, 1120 (1997).