. Israil, M. Tumpu, and N. D. Al Makassari, “Reducing the Environmental Impact of Asphalt Emulsion Production from Petroleum Bitumen utilizing Buton Island Natural Asphalt in Various Scenarios”, Eng. Technol. Appl. Sci. Res., vol. 14, no. 6, pp. 18380–18387, Dec. 2024.