J. G. Al Adwan, S. Al Kasassbeh, J. Al Thawabteh, B. Yasin, and Y. Alzubi, “Efficiency of Friction Pendulum Bearings in Vertically Irregular Structures Subjected to Various Types of Earthquakes”, Civ Eng J, vol. 8, no. 9, pp. 1815–1834, Sep. 2022.