by Smirnov, V. I., Afanas’ev, A. V., Prostakishin, I. S., Belen’kii, L. I.
Published in Chemistry of heterocyclic compounds (New York, N.Y. 1965) (01.06.2013)

by SEMUKHIN PETR A,SU, PROSTAKISHIN SERGEJ I,SU
Year of Publication 15.09.1989