V. V. . Cvetkovic, R. D. . Icco, T. P. Do, L. . Pellesi, M. . Ashina, and J. M. . Hansen, “Greater Occipital Nerve Block with Local Anesthetics and Corticosteroids in Treatment-Resistant Chronic Migraine”, Headache Med, vol. 12, no. 3, pp. 160–167, Nov. 2021.