R. D. Fan, Y. J. Du, and S. Y. Liu, “Effects of Addition of Fine-grained Zeolite on the Compressibility and Hydraulic Conductivity of Clayey Soil/Calcium-Bentonite Backfills for Vertical Cutoff Walls”, SEAGS-AGSSEA Journal, vol. 46, no. 3, pp. 54–61, Sep. 2015.