[1] WOLF E. Invariance of the spectrum of light on propagation [J]. Phys Rev Lett, 1986,56 (13): 1370~1372.
[2] PALMA C, CINCOTTI G, GUATTARI G. Spectral shift of a GaussianSchell model beam beyond a thin lens [J]. IEEE J Q E,1998,34(2):378~383.
[3] DACIC Z,WOLF E. Changes in the spectrum of a partically coherent light beam propagating in free space [J]. J O S A, 1988, A5 (7):1118~1126.
[4] CARTER W H, WOLF E. Coherence and radiometry with quasi-homogeneous planar sources [J]. J O S A, 1977, A67:785~796.