B. A. ABBAS; A. IBRAHIM; A. T. ANDYAR. Optimization of Compressive Strength of Periwinkle Shell Concrete Using Scheffe’s Model. Journal of Built Environment and Geological Research, Nigeria, v. 10, n. 4, 2025. DOI: 10.70382/ajbegr.v10i4.052. Disponível em: https://africanscholarpub.com/ajbegr/article/view/1045.. Acesso em: 11 nov. 2026.