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7Chris A Bell, Dan Sosnovske. Aging: Binder Validation [R] . SHRP-A-384, Strategic Highway Research Program, Nation Research Council,1994.
8C A Bell, Alan J Weider, Marco J Fellin. Laboratory Aging of Asphalt-Aggregate Mixtures: Field Validation [R] . SHRP-A-390, Strategic Highway Research Program, Nation Research Council, 1994.