Khodabakhshi, Neda, and S. Mansour Mansour Vaezpour. “Eigenvalue Problem for Nonlinear Elastic Beam Equation of Fractional Order”. Nonlinear Analysis: Modelling and Control 22, no. 6 (October 27, 2017): 821–840. Accessed May 4, 2024. https://www.journals.vu.lt/nonlinear-analysis/article/view/13364.