Approximation and Model Management in Aerodynamic Optimization with Variable-Fidelity Models. Alexandrov, N. M., Lewis, R. M., Gumbert, C. R., Green, L. L., & Newman, P. A. Journal of Aircraft, 38(6):1093–1101, 2001.
bibtex   
@Article{Alexandrov:2001:AAB,
    author      = {Natalia M. Alexandrov and Robert Michael Lewis and Clyde R. Gumbert and Lawrence L. Green and Perry A. Newman},
    title       = {Approximation and Model Management in Aerodynamic Optimization with Variable-Fidelity Models},
    journal     = {Journal of Aircraft},
    keywords    = {variable complexity, variable fidelity},
    number      = {6},
    pages       = {1093--1101},
    volume      = {38},
    year        = {2001}
}

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