T. T. Nhan, T. H. Tuyen, D. Q. Thien and N. T. N. Yen, Estimation of the pore water pressure and the settlement of saturated clay subjected to undrained multi-directional cyclic shear by using hypecbolic function in combination with the “curve-fitting” method, Vietnam J. Earth Sci. 37 (2015) 79–89. DOI: https://doi.org/10.15625/0866-7187/37/1/6559.