Hưng, Cao, 		Cam, Bùi, AND 		Dũng, Bạch.
" Effect of Surfactant on Degradation of Polycyclic Aromatic Hydrocarbons (pahs) in Thermophilic Anaerobic Co-Digestion of Sludge from Kim-Ngưu River and Organic Waste" <em>VNU Journal of Science: Natural Sciences and Technology</em> [Online], Volume 30 Number 1 (15 March 2014)