1. A. J. Barrat, L. R. Bates, J. M. Jenkins, J. R. White, AD752370, 1971. This Ref. is a Technical Note of the US Ministry of Defense, the notation, ADxxxxxx, is adopted in Chemical Abstract (C.A.)
2. The Comparative Acidic Properties of Some 5-Substituted Tetrazoles
3. Infrared Absorption Spectra of Compounds of High Nitrogen Content
4. P. J. Haskins, Proceedings of the International Conference on Research in Primary Explosive. ERDE, Waltham Abbey, Essex, England, March l7–19, 1975. Vol. 2, paper 14/21 and pages following.