Sawada, L.A., Santos, B.M. dos, Arthuzo, L.C., Moraes, T.C. de O., Storarri, A.C.M., Lee, A.A.H., Gonzaga, B.P.M. and Domingues, R.B. 2024. Sphenopalatine Ganglion Block in Refractory Cluster Headache: A Case Report. Headache Medicine. 15, Supplement (Aug. 2024), 78.