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A. Rybacki, M. Geller, and C. Schemmann, "Geometry optimization of a centrifugal compressor impeller with respect to CFD- and FEM-relevant target variables using automated optimization methods," in NAFEMS German language conference '12 : May 8-9, Bamberg, Germany ; Calculation and Simulation - Applications, Developments, Trends, Bernau: NAFEMS Deutschland, Österreich, Schweiz GmbH, 2012, p. no page reference-no page reference.