1. Air Quality Improvement Program (AB 118), in: California Air Resources Board.
2. AB32 (Assembly Bill 32): Global Warming Solutions Act, in: California Air Resources Board.
3. Available from W.P.L. Carter, http://www.cert.ucr.edu/∼carter/absts.htm#saprc99.
4. EMFAC2007 Release;California Air Resources Board,2007
5. iADAM, Air Quality Data Statistics;California Air Resources Board,2013