1. ASEAN-JAPAN Transport Partnership. 2012. Data Template for Road Transport. Vietnam: AJTP Information Center.
2. Air Pollution: A Silent Killer. Tuoi Tre News, July 10, 2011, http://tuoitrenews.vn/english-study/2165/air-pollution-a-silent-killer . Accessed 20 Feb 2015.
3. Cuc Phuong National Park Welcomed Over 80 Thousand Tourists. cucphuong.info, November 7, 2015, http://cucphuong.info/2015/11/07/cuc-phuong-national-park-welcomed-over-80-thousand-tourists-in-2011/ . Accessed 19 May 2016.
4. Al-Mulali, Usama, Behnaz Saboori, and Ilhan Ozturk. 2015. Investigating the Environmental Kuznets Curve Hypothesis in Vietnam. Energy Policy 76: 123–131.
5. Bass, Steve, David Annandale, Phan Van Binh, Tran Phuong Dong, Hoang Anh Nam, Le Thi Kien Oanh, Mike Parsons, Nguyen Van Phuc, and Vu Van Trieu. 2010. Integrating Environment and Development in Viet Nam: Achievements, Challenges and Next Steps. Paper resulting from the Viet Nam Environmental Mainstreaming ‘Lessons Learned Review’ of March 2009 organized by IIED in association with the Viet Nam/UNDP Poverty Environment Programme.