1. Al-Aswad, K. K. M., “Liquid-liquid extraction in a pilot scale rotating disc contactor,” Ph.D. Thesis, The University of Aston in Birmingham (1982).
2. “Droplet diameters in agitated liquid-liquid systems”;Baird;Chem. Eng. Sci.,1979
3. “Hydrodynamic properties of rotary-disc extractor: Part I - Distribution of the sizes of drops and their residence time”;Blazej;Chem. Zvesti.,1978
4. “Drop size and extraction efficiency measurements in a pilot plant rotating disc contactor”;Chartres;Trans. Inst. Chem. Eng.,1978