1. D. Bratland, K. Grjotheim and C. Krohn, Light Metals 1976, v. 1, p. 3.
2. W. Haupin, Light Metals 1998, p. 531.
3. K. Grjotheim and H. Kvande, Introduction to Aluminium Electrolysis, Aluminium-Verlag, Düsseldorf, pp. 18 – 22 1993.
4. K. Grjotheim, C. Krohn, M. Malinovsky, K. Matiasovsky, and J. Thonstad, Aluminium Electrolysis, 2nd Edition, Section 7.2.2, Primary anode product. Aluminium-Verlag, Dusseldorf Germany (1982) pp. 228 223.
5. Ibid., Section 7.2.6, Mechanism of anode process p 237.