1. G. Reuter: Doctoral Thesis, Rheinisch-Westfalischen Technischen Hochschule Aachen, Aachen, Germany, October 1975.
2. K.W. Carley-Macauly and M.B. Donald:Chemical Engineering Science, 1962, vol. 17, pp. 493–506.
3. C. E. Sunnergren: National Lime Association Operators Meeting, Seattle, WA, September 24, 1979.
4. Fr. Muller: Aufbereitungs-Technik, 1966, vol. 5, pp. 274–85.
5. A.M. Gow, A.B. Campbell, and W. H. Coghill:AIME, 1930, vol. 87, pp. 51–81.