Staab, Heinz A. Department of Organic Chemistry, Max Planck Institute for Medical Research, Max Planck Society;
http://onlinelibrary.wiley.com/doi/10.1002/oms.1210270426/epdf (Any fulltext)
https://dx.doi.org/10.1002/oms.1210270426 (Any fulltext)
Rentzea, M., Brox, W., & Staab, H. A. (1992). Proximity effects in the mass spectra of crowded bis(dialkylamino)arenes. Part IV: A tandem mass spectrometry study of fluorenodiazonine and fluorenodiazecine derivatives. Organic Mass Spectrometry, 27(4), 521-522. doi:10.1002/oms.1210270426.