Machulin V, Motsnyi F, Peresh E, Smolanka O, Svechnikov G. Effect of temperature variation on shift and broadening of exciton band in Cs₃Bi₂I₉ layered crystals. Fiz. Nizk. Temp. [інтернет]. 21, Жовтень 2004 [цит. за 11, Листопад 2025];30(12):1283-6. доступний у: http://80.92.230.95/index.php/fnt/article/view/f30-1283e