1. New developments in the activated sludge process;Benedek,1964
2. Basic Principles in the Activated Sludge Bio-treatment of Municipal and Industrial Wastes;Benedek;VITUKI report in English language,1967
3. Grundriss der chemischen Reaktionstechnik;Brötz,1958
4. Continuous flow systems;Danckwerts,1953
5. Population dynamics in biological treatment plants;Downing,1966