8BROWN S. Carbon Footprint - How does asphalt stack up[R].Lanham:Asphalt Pavement Alliance (APA), 2011.
9TRELOARGJ, LOVE P E D, CRAWFORD R.Hybrid Life-Cycle Inventory for Road Construction and Use [J]. Journal of Construction Engineering and Management, 2004,130(1 ):43-49.
10STRIPPLE H.Life Cycle Assessment of Road: A Pilot Study for Inventory Analysis ( Report No.B1210E)[R]. Gothenburg,Sweden :IVL Swedish Environmental Research Institute Ltd, 2001.