1. Russell , Edwards Taylor “Solubility and Density of Hydrated Aluminas in NaOH Solution,” Journal of Metals, October 1955, p. 1123
2. K. Bielfeldt “Practical Experience with the Tube Digester,” paper presented at TMS-AIME Annual Meeting, New York, New York, February 1968
3. Maslenitiski “Autoclave Processes in Alumina Production,” Izd. Metalurgiya, Moscow, 1969
4. Winkhaus , G. “Measurements by Means of Radioisotopes in Industrial Tube Digester and Autoclave Lines of Bauxite Plants,” Proceedings ICSOBA, Volume 3, pp. 147-157, 1971
5. Perry “Modification to Bauxite Digestion,” Proceedings ICSOBA, Volume 1, pp. 43-57, 1970