A. T. Arrang, R. Irmawaty, R. Djamaluddin, and H. Parung, “Mechanical and Microstructural Evaluation of Utilizing Nickel Slag as Sustainable Aggregate in Asphalt Mixtures”, Eng. Technol. Appl. Sci. Res., vol. 15, no. 6, pp. 29021–29027, Dec. 2025.