Pulgarín-Agudelo F.A. Vigil-Galán O. Andrade-Arvizu J.A. González-Castillo J.R. Rodríguez-González E. Courel M. Sánchez Y. Saucedo E. "Cu content dependence of Cu2Zn(SnGe)Se4 solar-energy-materials-and-systems cells prepared by using sequential thermal evaporation technique of Cu/Sn/Cu/Zn/Ge stacked layers" Journal of Materials Science: Materials in Electronics 29, 18, pp. 15363 - 15368. 2018 DOI: 10.1007/s10854-018-8915-5