Pistor, P., Meyns, M., Guc, M., W, H.C., Marques, M.A.L., Alcobé, X., Cabot, A., Izquierdo-Roca, V. "Advanced Raman spectroscopy of Cs2AgBiBr6 double perovskites and identification of Cs3Bi2Br9 secondary phases" Scripta Materialia 184, pp. 24 - 29. 2020 DOI: 10.1016/j.scriptamat.2020.03.040