参考文献

Kalme, Z. A.; Roloff, B.; Pelcher, Yu. E.; Popelis, Yu. Yu.; Khagen, F.; Dubur, G. Ya Chemistry of Heterocyclic Compounds (New York, NY, United States), 1992 , vol. 28, # 9 p. 1031 - 1035 Khimiya Geterotsiklicheskikh Soedinenii, 1992 , # 9 p. 1218 - 1222