Izquierdo-Roca, V.; Fontane, X.; Calvo.Barrio, L.; Alvarez-Garcia, J.; Perez-Rodriguez, A.;Morante, J.R.; Witte, W.; Klenk, R. "Characterization of secondary phases in Cu-poor CuInSe2: Surface and in-depth resolved raman scattering analysis of polycrystalline layers" Materials Research Society Symposium Proceedings 1165, pp. 185 - 190. 2010