DUAN, Ning; ZHAO, Xiaopeng. Optimal control for a higher-order nonlinear parabolic equation describing crystal surface growth. Nonlinear Analysis: Modelling and Control, [S. l.], v. 23, n. 2, p. 251–268, 2018. DOI: 10.15388/NA.2018.2.7. Disponível em: https://www.journals.vu.lt/nonlinear-analysis/article/view/13323.. Acesso em: 3 may. 2024.