Olar, T., Manoharan, A., Draxl, C., Calvet, W., Umsur, B., Parvan, V., Chacko, B., Xie, H., Saucedo, E., Elisa Valle-Rios, L., Neldner, K., Schorr, S., Ch Lux-Steiner, M., Lauermann, I. "Valence and conduction band edges of selenide and sulfide-based kesterites – A study by x-ray based spectroscopy and ab initio theory" Semiconductor Science and Technology 32, 10, pp. - 2017 DOI: 10.1088/1361-6641/aa89db