[5] Roland Winston，Harald Ries.Nonimaging reflectors as functional of the desired irradiance［J］. J. Opt. Soc. Am.， 1993，10(9):1902-1908
[8] Nira Dyn，Daid Levin.A4-point Interpolatory Subdivision Scheme for Curve Design［J］.Computer Aided Geometric Design，1987，(4):257-268
