Thoi Trung, N., N. Thanh Phong, and N. Phu Vinh. “NUMERICAL SOLVING THE ONE-DIMENSION ELASTIC-PLASTIC PROBLEM BY "RETURN MAPPING” ALGORITHM”. Science and Technology Development Journal, Vol. 7, no. 1, Jan. 2004, pp. 5-14, doi:https://doi.org/10.32508/stdj.v7i1.3146.