Caballero, R.; Izquierdo-Roca, V.; Fontane, X.; Kaufmann, C.A.; Alvarez-Garcia, J.; Eicke, A.; Calvo-Barrio, L.; Perez-Rodriguez, A.; Schock, H.W.; Morante, J.R. "Cu deficiency in multi-stage co-evaporated Cu(In,Ga)Se2 for solar cells applications: Microstructure and Ga in-depth alloying" Acta Materialia 58, 9, pp. 3468 - 3476. 2010 DOI: 10.1016/j.actamat.2010.02.021