T. Takezaki, T. Fujiyoshi, and K. Tajima, “Macrogeographic and micrographic comparative study of risk factors for gastric cancer in Japan, China and South America”, Estud. Atacameños (En línea), no. 15, pp. 13–20, Jun. 1998, doi: 10.22199/S07181043.1998.0015.00003.