Hafner, Klaus ; Schmidt, Frank https://tuprints.ulb.tu-darmstadt.de/22302/1/Angew%20%20Chem%20%20Int%20%20Ed%20%20Engl%20-%20May%201973%20-%20Hafner%20-%20A%20Stable%202%E2%80%90Azapentalene.pdf.
,
2023
Hafner, Klaus ; Schmidt, Frank https://tuprints.ulb.tu-darmstadt.de/22231/1/Angewandte%20Chemie%20-%20Mai%201973%20-%20Hafner%20-%20Ein%20stabiles%202%E2%80%90Aza%E2%80%90pentalen.pdf.
,
2023