Neugebauer, Franz A. Department of Organic Chemistry, Max Planck Institute for Medical Research, Max Planck Society;
http://onlinelibrary.wiley.com/doi/10.1002/anie.197304551/epdf (Any fulltext)
https://doi.org/10.1002/anie.197304551 (Any fulltext)
Neugebauer, F. A. (1973). Hydrazidinyl Radicals: 1 2,4,5-Tetraazapentenyls, Verdazyls, and Tetrazolinyls. Angewandte Chemie International Edition, 12(6), 455-464. doi:10.1002/anie.197304551.