Baker, D.; Knipe, H.; Collins, J.;
LEON, J. J. M.; Cummings, E.; Blair, C.; Gamson, D.(2010).
One hundred years of elementary school mathematics in the United States: A content analysis and cognitive assessment of textbooks from 1900 to 2000. Journal for Research in Mathematics Education. Volumen: 41. (pp. 383 - 423). Recuperado de:
https://www.jstor.org/stable/41103881?seq=1#page_scan_tab_contentsBaker, D.; Collins, J.;
LEON, J. J. M.(2008).
Risk Factor or Social Vaccine? The Historical Progression of the Role of Education in HIV and AIDS Infection in Sub-Saharan Africa. Prospects. Volumen: 38. (pp. 467 - 486). Recuperado de:
https://eric.ed.gov/?id=EJ849433