Louvison, M. C. P.; Lebrão, M. L.; Duarte, Y. A. O.; Santos, J. L. F.; Malik, A. M.; Almeida, E. S. de. Inequalities in Access to Health Care Services and Utilization for the Elderly in São Paulo, Brazil . Rev. saúde pública 2008, 42 (4), 733-740. https://doi.org/10.1590/S0034-89102008000400021.