Optimal design of Vertical-Taking-Off-and-Landing UAV wing using multilevel approachHao Yue, David Bassir, Hicham Medromi, Hua Ding and Khaoula AbouzaidInt. J. Simul. Multidisci. Des. Optim., 11 (2020) 26DOI: https://doi.org/10.1051/smdo/2020020