Chung, N. V., N. T. Him, B. Q. Khiem, and P. N. Tien. “An Effective High-Order Element for Analysis of Two-Dimensional Linear Problem Using SBFEM”. Journal of Science and Technology in Civil Engineering (JSTCE) - HUCE, Vol. 15, no. 3, Aug. 2021, pp. 109-22, doi:10.31814/stce.nuce2021-15(3)-09.