Zou, L.-F., S. Acosta-Ortíz, L. Regalado, LuXin Zou., J. Sarabia-Torres, ., and G. Pérez-Herrera. “Surface and Structural Characterization of Si¡-xGeX/Si Alloys and Multi-Quantum Wells Grown by Gas Source Molecular Beam Epitaxy”. Revista Mexicana De Física, vol. 46, no. 5, Jan. 2000, pp. 415-8, https://rmf.smf.mx/ojs/index.php/rmf/article/view/2988.