S. R. Sabab, U. J. Alengaram, C. C. Onn, and S. S. Sinoh, “Compressive strength and gel formation of enhanced geopolymer with addition of nanomaterials – a review”, JCEM, vol. 32, no. 7, pp. 904–938, Oct. 2026, doi: 10.3846/jcem.2026.27863.