1. Health Effects of Transport-Related Air Pollution;Krzyzanowski,2005
2. Ambient (Outdoor) Air Quality and Health
3. WHO Global Urban Ambient Air Pollution Database (Update 2016),2016
4. Ambient Air Pollution: A Global Assessment of Exposure and Burden of Disease,2016
5. Air Pollution: Africa’s Invisible, Silent Killerhttp://www.unep.org/stories/Airpollution/Air-Pollution-Africa-Invisible-Silent-Killer.asp