1. Exploitation of chlorophyll containing microorganisms in sewage disposal;Abbott;Chem. Ind. (Brit).,1950
2. Role of Chlorella and Scenedesmus in the purification of sewage in Baku;Abdullaeva;Water Pollut.,1968
3. Standard Methods for Examination of Water and Waste Water;APHA,1980
4. Waste Stabilization Ponds Design, Construction and Operation in India;Arceivala,1970
5. Use of algae in removing phosphorous from sewage;Bogan;J. Sanit. Engng. Div. Amer. Soc. Civil. Engr.,1960