1. Kostov G, Investigation of fermentation systems for ethanol production, PhD Thesis, University of Food Technologies, Plovdiv, 2007, 180.
2. Patterns of flow in chemical process vessels;Levenspiel,1963
3. Chemical reaction engineering;Levenspiel,1999
4. Axial dispersion of liquid in fluidised bed with external recycling: two dynamic modelling approaches with a view to control;Otton;Biochemical Engineering Journal,2000
5. RTD 3.14 Textbook, www.cisp.spb.ru.