S.P. Sarmah, V. Burlakov, E. Yengel, B. Murali1, E. Alarousu, A.M. El -Zohry, C. Yang, M.S. Alias, A. Zhumekenov, M.I. Saidaminov, N. Chao, N. Wehbe, S. Mitra, I. Ajia, S. Dey, A. Mansur, A. Amassian, I. S. Roqan, B.S. Ooi, A. Goriely, O.M. Bakr, O.F. Mohammed. Double Charged Surface Layers in Lead Halide Perovskite Crystals. Nano Letters. 2017. 17. 3. 2021–2027