1. Akratos, C. S., & Tsihrintzis, V. A. (2007). Effect of temperature, HRT, vegetation and porous media on removal efficiency of pilot-scale horizontal subsurface flow constructed wetlands. Ecological Engineering, 29, 173–191.
2. Alley, B. L., Beebe, D. A., Rodgers, J. H., Jr., & Castle, J. W. (2011). Chemical and physical characterization of produced water from conventional and unconventional fossil fuel resources. Chemosphere, 85, 74–82.
3. American Public Health Association (APHA), American Water Works Association, & Water Pollution Control Federation. (2005). Standard methods for examination of water and wastewater (21st ed.). Washington, D.C.: American Public Health Association.
4. American Society of Testing and Materials (ASTM). (2011). Standard practices for sampling of waterborne oils. ASTM D4489-95. Easton: ASTM.
5. Atlas, R. M., & Bartha, R. (1998). Microbial ecology. Fundamentals and applications. Menlo Park: Addison–Wesley Longman.