1. (a) The Chemistry of the Azido Group, Wiley Interscience, London, 1971;
2. (b) Methoden Org. Chem. (Houben-Weyl) 4th ed. 1952
3. Photochemical and thermal rearrangement of heavier main-group element azides
4. (d) in Developments in Inorganic Nitrogen Chemistry (Hrsg.:), Elsevier, Amsterdam, 1966, S. 72 ff;