Nguyen, T. X., and L. T. Tran. “A Simplified Variant of the Time Finite Element Methods Based on the Shape Functions of an Axial Finite Bar”. Journal of Science and Technology in Civil Engineering (JSTCE) - HUCE, Vol. 15, no. 4, Oct. 2021, pp. 42-53, doi:10.31814/stce.huce(nuce)2021-15(4)-04.