Nonlinear bending analysis of nanoplates made of FGMs based on the most general strain gradient model and 3D elasticity theoryY. Gholami, R. Ansari, R. Gholami and H. RouhiEur. Phys. J. Plus, 134 4 (2019) 167DOI: https://doi.org/10.1140/epjp/i2019-12501-x