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APA Citation
Nawaz, Y., Arif, M. S., Bibi, M., Naz, M., & Fayyaz, R. (2019). an effective modification of He's variational approach to a nonlinear oscillator. Journal of low frequency noise, vibration, and active control, 38(3), 1013–1022. http://access.bl.uk/ark:/81055/vdc_100088593123.0x0000bd