Rodrigues, J. M. ., V. V. . Caires, K. B. C. . Fontoura, T. C. S. . Silva, S. F. . Goulart, C. M. . Rocha, A. L. . Teixeira, and A. A. da . Silva Junior. “Prevalence of Headaches in Individuals Referred from Primary Care to Secondary Care”. Headache Medicine, vol. 2, no. 4, Dec. 2011, pp. 200-3, doi:10.48208/HeadacheMed.2011.29.