Peter B. Dervan, Michael E. Squillacote, Paul M. Lahti, Alan P. Sylwester, John D. Roberts,
Nitrogen-15 NMR spectrum of a 1,1-diazene. N-(2,2,6,6-tetramethylpiperidyl)nitrene Journal of the American Chemical Society. ,vol. 103, pp. 1120- 1122 ,(1981) ,
10.1021/JA00395A021