2Ramnefors M,Bensryd R, Perzon S. Accuracy of drag predictions on cars using CFD-effect of grid refinement and turbulence models[A]. SAE[C]. [s. l. ] :SAE,1996. ASE 960681.
3Calkins D E,Chan W T. "Cdaero" A parametric aerodynamic drag prediction tool[ A].SAE[C]. [s.l. ] :SAE,1998. SAE 980398.