1. Al-Mehthel, M. et al. 2010. Sulfur extended asphalt as a major outlet for sulfur that outperformed other asphalt mixes in the gulf. Sulphur world symposium, Qatar, 12–15.
2. Apodaca, L.E., 2019. Sulfur. National Minerals Information Center, United States Geological Survey. Available from: prd-wret.s3-us-west-2.amazonaws.com/assets/palladium/production/atoms/files/mcs-2019-sulfu.pdf
3. Arora, M.G. et al. 1994. Long-term pavement performance history of sulfur-extended asphalt test roads in eastern province of Saudi Arabia. Transportation research record (1435).
4. Ashtekar, S. and Narayanan, S., 2013. Bituminous composition with reduced emission of hydrogen sulfide. U.S. Classification 106/275; International Classification C08L95/00; Cooperative Classification C08L95/00, C08K5/3415.