Andriamanalina, Toavina M, et al. “Self-Healing Concrete by Microorganisms in the Altered Pozzolan of Madagascar With Calcium from Crab Wastes”. American Journal of Education and Technology, vol. 2, no. 1, Jan. 2023, pp. 1-9, https://doi.org/10.54536/ajet.v2i1.1061.