8Epps J A, Little D H, Holmgreen R J. Effect of recycling agents on the structural performance of recycled asphalt concrete materials[J]. AAPT, 1981,50(2):32-63.
9Little D H, Epps J A. Evaluation of certain structural characteristics of recycled pavement materials [J]. AAPT,1980,49(5):219-251.
10Isacssan U, Lu X. Testing and appraisal of polymer modified road bitumen' s state of the art[J]. Materials and Structures, 1995,28(6):129-139.