[2] R. J. Nemanich, S. A. Solin, R. M. Martin. Light scattering study of boron nitride microcrystals. Phys. Rev. (B), 1981, 23(12): 6348~6356
[3] I. H. Campbell, P. M. Faychet. The effects of microcrystal size and shape on the phonon Raman spectra of crystalline semiconductors. Solid State Commun., 1986, 58(10): 739~741
[6] G. Nilsson, G. Nelin. Phonon dispersion relations in Ge at 80 °K. Phys. Rev. (B), 1971, 3(2): 364~369