M. A. Soomro, M. A. Keerio, M. A. Soomro, and D. K. Bangwar, “3D Centrifuge Modeling of the Effect of Twin Tunneling to an Existing Pile Group”, Eng. Technol. Appl. Sci. Res., vol. 7, no. 5, pp. 2030–2040, Oct. 2017.