Theoretical investigation of nonlinear optical properties of Mathieu quantum well E. B. Al, A. J. Peter, M. E. Mora-Ramos and F. Ungan Eur. Phys. J. Plus, 138 1 (2023) 49 Published online: 20 January 2023 DOI: 10.1140/epjp/s13360-023-03678-y