1. ACS, Petroleum Division Annual Meeting;Palmer,2008
2. NPRA Conference;Clark,2010
3. Burns & Mc Donnell, Engineering, Architecture, Construction, Environmental and Consulting Solutions;Nispel,2008
4. Regulatory announcement: direct final rulemaking revising mobile source air toxics early credit technology requirement, EPA420-F-08-007, February 2008.
5. Rules and Regulations, Federal Register, 73 (49) (Wednesday, March 12), 2008.