K. Gallegos-Carrillo, C. García-Peña, C. Duran-Muñoz, H. Reyes, and L. Durán-Arenas, “ Self-perceived health status: an approach of the elderly in Mexico ”, Rev. saúde pública, vol. 40, no. 5, pp. 792–801, Oct. 2006, doi: 10.1590/S0034-89102006000600008.