J. Illa Boris and J. Pulgar Vidal Otalora, “Peru’s absence in the 1952 Helsinki Olympic Games and in the Qualifiers for the 1950Brazil and 1954 Switzerland FIFA World Cups”., Mat. His. Dep., no. 29, pp. 7–24, Jun. 2025, doi: 10.20868/mhd.2025.29.5227.