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., vol. 37, no. 1, pp. 79–89, Jul. 2015.