1. Narrow-Gap Semiconductors;Nimtz,1985
2. Semiconductors and Semimetals;Melngailis,1970
3. Pearson’s Handbook of Crystallographic Data for Intermetallic Phases, second ed., in: P. Villars, L.D. Calvert (Eds.), ASM International, Ohio, 1996.
4. Semiconductor – Basic Data,1996