Raghavan, B. ., P. . Breitkopf, and P. Villon. “POD-Morphing, an a Posteriori Grid Parametrization Method for Shape Optimization”. European Journal of Computational Mechanics, vol. 19, no. 5-7, Aug. 2010, pp. 671-97, doi:10.13052/EJCM.19.671-697.