2023. Optimal Error Estimates of the Semi-Discrete Local Discontinuous Galerkin Method and Exponential Time Differencing Schemes for the Thin Film Epitaxy Problem Without Slope Selection. Advances in Applied Mathematics and Mechanics. 15, 3 (Feb. 2023), 545–567. DOI:https://doi.org/10.4208/aamm.OA-2021-0204.