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  Witte, W.; Jackson, P.; Buecheler, S.; Carron, R.; Siebentritt, S.; Werner, F.; Duguay, S.; Vilalta-Clemente, A.; Menozzi, R.; Sozzi, G.; Bourgeois, E.; Degutis, G.; Bär, M.; Kunze, T.; Sadewasser, S.; Nicoara, N.; Puska, M. J.; Malitckaya, M.; Tiwari, A. N.: Towards the next generation of high-efficiency Cu(In,Ga)Se2 thin-film solar cells – Sharc25. Photovoltaics International 41 (2018), p. 79-89
  https://www.pv-tech.org/technical-papers/towards-the-next-generation-of-highefficiency-cuingase2-thin-film-solar-cel