1. National Center for Asphalt Technology. Asphalt film thickness debunked. NCAT at Auburn University. http://www.eng.auburn.edu/research/centers/ncat/newsroom/2017-spring/film-thickness.html#:∼:text=Conclusion,its%20gradation%20are%20not%20valid. Accessed July 21, 2022.
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3. permeability, film thickness vs. asphalt hardening;Goode;J. Assoc. Asph. Paving Technol.,1965
4. hardening as affected by film thickness, voids, and permeability in asphaltic mixtures;Kumar;J. Assoc. Asph. Paving Technol.,1977
5. Evaluation of voids in the mineral aggregate for HMA paving mixtures. Report No. 96-04;Kandhal;Natl. Cent. Asph. Technol. (NCAT),1996