References
- Angelov , Ch. M. 1983 . Phosphorus and Sulfur , 15 : 177 C.A.: 99, 53800m (1983)
- Angelov , Ch. M. , Vachkov , K. V. , Petrova , J. and Kirilov , M. 1982 . Phosphorus and Sulfur , 14 : 7 C.A.: 98, 198333a (1983)
- Angelov , Ch. M. and Christov , Ch. Zh. 1983 . Heterocycles , 20 : 219 C.A.: 99, 122539x (1983)
- Angelov , Ch. M. , Vachkov , K. V. , Kirilov , M. and Lebedev , V. B. 1982 . Zh. Obshch. Khim. , 52 : 538 C.A.: 97, 6420m (1982)
- Angelov , Ch. M. , Christov , Ch. Zh. and Ionin , B. I. 1982 . Zh. Obshch. Khim. , 52 : 264 C.A.: 96, 181360t (1982)
- Khusainova , N. G. , Naumova , L. V. , Berdnikov , E. A. and Pudovik , A. N. 1982 . Zh. Obshch. Khim. , 52 : 1040 C.A.: 97, 110109c (1982)
- Tancheva , Ch. N. , Mondeshka , D. D. and Angelov , Ch. M. 1987 . Phosphorus and Sulfur , 31 : 89
- Angelov , Ch. M. , Mikhailova , T. S. , Ignat'ev , V. M. , Dogadina , A. V. and Ionin , B. I. 1979 . Compt. rend. bulg. Acad. Sci. , 32 : 619 C.A.: 92, 22563m (1980)