Dimroth, F.; Tibbits, T.; Beutel, P.; Karcher, C.; Oliva, E.; Siefer, G.; Schachtner, M.; Wekkeli, A.; Steiner, M.; Wiesenfarth, M.; Bett, A.; Krause, R.; Gerster, E.; Piccin, M.; Blanc, N.; Rico, M.; Drazek, C.; Guiot, E.; Wasselin, J.; Arena, C.; Salvetat, T.; Tauzin, A.; Signamarcheix, T.; Hannappel, T.: Development of high efficiency wafer bonded 4-junction solar cells for concentrator photovoltaic applications. In: 2014 IEEE 40th Photovoltaic Specialist Conference, PVSC 2014 : Colorado Convention Center, Denver, Colorado, 8-13 June 2014 / volume 1 of 5. Piscataway, NJ: IEEE, 2014. - ISBN 978-1-4799-4398-2, p. 6-10