Observation of a highly spin-polarized topological surface state in GeBi2Te4 / K. Okamoto, K. Kuroda, H. Miyahara [et.al.] // Physical Review B. 2012. Vol. 86, № 19. P. 195304-1-195304-5. URL: http://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000446171