T. Nguyen-Tran, M. N. An, T. T. Luong, H. H. Nguyen and T. T. Truong, Growth of single crystals of methylammonium lead mixedhalide perovskites, Comm. Phys. 28 (2018) 237. DOI: https://doi.org/10.15625/0868-3166/28/3/12666.