1. Blakely, J. M., Introduction To The Properties Of Crystal Surfaces. Oxford: Pergamon Press 1973.
2. Bennema, P. Et Al., Kristall Tech. 8 (1973) 659
3. Beyer, H., Handbuch Der Mikroskopie. Berlin: Veb Verlag Technik 1973.
4. Komatsu, H., Characterization Of Crystal Surfaces By Optical Microscopy (I). In: Crystal Growth and Characterization. Eds. : R. UEDA, J. B. MULLIN. Amsterdam/Oxford: North-Holland Publ. Comp. 1975, p. 333.
5. Sunagawa, I., Characterization Of Crystal Surfaces By Optical Microscopy (II). Ibid. p. 347.