M. I. Peñarrieta de Córdova, E. J. Mercado Curi, S. Piñones Martínez, T. Gutiérrez Gómez, and B. del Ángel, “FACTORS THAT TAKE PART IN THE USAGE OF THE HEALTH SERVICES FROM SENIOR ADULTS”, Invest. Educ. Enferm., vol. 24, no. 2, Apr. 2008.