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APA Citation
Xu, J., Zhu, Q., Wu, J., & Xiong, R. (2023). existence and uniqueness of the solution to a second-order nonlinear dynamical system model with an unbounded variable and a discontinuous input. Applied mathematics in science and engineering, 31(1), . http://access.bl.uk/ark:/81055/vdc_100173961899.0x000001