P. D. Tho, T. M. Tien, D. T. Thanh, V. M. Ngan, V. M. Ngoc, and L. Sorelli, “Experimental investigation of the secondary creep of fiber reinforced concrete at high stress: Macroscopic measurement and digital image correlation”, JSTCE, vol. 16, no. 1, pp. 19-28, Jan. 2022.