1. Ueber Diphenylenazon, einen neuen, ringförmig geschlossenen, stickstoffhaltigen Atomcomplex
2. Zur Kenntniss des Diphenylenazons
3. “The Chemistry of Heterocyclic Compounds, Condensed Pyridazine and Pyrazine Rings,”;Simpson,1953
4. I. Wilson, B.Sc. Thesis, University of Bristol (1964).