1. The Chemistry of Synthetic Dyes, Vol. 2, p. 761; Academic Press, New York 1952
2. Diazo Chemistry, VCH Verlagsgesellschaft, Weinheim 1994
3. in Houben-Weyl, Methoden der Organ. Chemie, Vol. X/2, p. 1017, Georg Thieme, Stuttgart 1971
4. in Houben-Weyl, Methoden der Organ. Chemie, Vol. VI/1c, p. 4, Georg Thieme, Stuttgart 1976