1. The Chemistry of Synthetic Dyes, Academic Press, New York, 1952, vol. 2, p. 761.
2. [2a] Diazo Chemistry, VCH Verlagsgesellschaft, Weinheim, 1994.
3. [2b] – in Houben-Weyl, Methoden der Organischen Chemie (Ed.: ), Georg Thieme, Stuttgart, 1965, vol. X/1, p. 1.
4. in Houben-Weyl, Methoden der Organischen Chemie (Ed.: ), Georg Thieme, Stuttgart, 1971, vol. X/1, p. 1017.
5. [4a] in Houben-Weyl, Methoden der Organischen Chemie (Ed.: ), Georg Thieme, Stuttgart, 1965, vol. X/3, p. 695.