1. Thermodynamics;Pitzer,1961
2. ‘Application of the entropy index to evaluate the efficiency of separator operation’;Agranonik;Chem. Petrol Eng.,1984
3. ‘Application of the entropy index to evaluate the efficiency of thickening equipment’;Sulla;Vodosnabzhenie i Sanitarnaya Tekhnika,1972
4. ‘A definition of separation efficiency’;Ogawa;J. Chem. Eng. Jpn.,1978