Neugebauer, Franz A. Department of Organic Chemistry, Max Planck Institute for Medical Research, Max Planck Society;
http://onlinelibrary.wiley.com/doi/10.1002/ange.19690811309/epdf (Any fulltext)
https://doi.org/10.1002/ange.19690811309 (Any fulltext)
Neugebauer, F. A. (1969). Kristallisiertes Tetrazolinyl-Radikal. Angewandte Chemie, 81(13), 496. doi:10.1002/ange.19690811309.