P. Chattonjai, W. Phongtinnaboot, S. Khunayai, S. Pattanajan, S. Suwannaparteep, and J. Kunlabut, “Influence of Recycled Asphalt Concrete Pavement Gradation on CBR of Mixed Materials”, RJST, vol. 8, no. 2, pp. 141–151, Aug. 2026.