Hijriah, ., . Fakhruddin, A. Hidayat, and A. Fallevi. “High-Quality Composite Concrete Based on Eco Materials from Nickel Slag Waste As an Implementation of Sustainable Infrastructure”. Engineering, Technology & Applied Science Research, vol. 15, no. 6, Dec. 2025, pp. 29929-34, doi:10.48084/etasr.14487.