Dr. Osvaldo Leyva Camacho
Otros textos del Dr. Osvaldo Leyva
https://www.researchgate.net/profile/Osvaldo-Leyva-Camacho
https://scholar.google.com.mx/citations?user=bj2TEg8AAAAJ&hl=es
Tesis de Doctorado
https://www.colef.mx/posgrado/wp-content/uploads/2010/02/TESIS-Leyva-Camacho-Osvaldo-DCSER.pdf