1. Gray JB, Oldshue JY. Mixing theory and practice, vol. 3. In: Uhl VW, Gray JB, editors. Academic Press. Inc, 1986:16.
2. Halland FA, Chapman FS. Liquid mixing and processing in stirred tank. Reinhold Publ Corp, 1966.
3. Zwietering TN. Chem Eng Sci 1958;8(3/4):244. (quoted in above ref. 1, p. 61).
4. Einenkel W. German Chem Eng 1980;3:118. (quoted in above ref. 1, p. 60).
5. Kneule F, Weinspach PM. Verfahrenstechnik 1967;1(12):531 (quoted in above ref. 1, p. 60).