“Halide-substituted electronic properties of organometal halide perovskite films: direct and inverse photoemission studies” ,
Li Chi, Wei Jian, Sato Mikio, Koike Harunobu, Xie Zhong-Zhi, Li Yan-Qing,Kanai Kaname, Kera Satoshi, Ueno Nobuo, Tang Jian-Xin, 
Applied Materials & Interfaces 8, 11526-11531 (2016)