J. Alsarraf, K. Alawadhi, A. Alnaqi, and S. Swilem, “A new approach using hybrid power series – cuckoo search optimization algorithm to solve electrostatic pull-in instability and deflection of nano cantilever switches subject to van der waals attractions”, IJET, vol. 6, no. 2, pp. 29–35, May 2017, doi: 10.14419/ijet.v6i2.7488.