Cvetkovic, Vlasta Vukovic, Roberto De Icco, Thien Phu Do, Lanfranco Pellesi, Messoud Ashina, and Jakob Møller Hansen. “Greater Occipital Nerve Block With Local Anesthetics and Corticosteroids in Treatment-Resistant Chronic Migraine”. Headache Medicine 12, no. 3 (November 16, 2021): 160–167. Accessed November 23, 2024. https://headachemedicine.com.br/index.php/hm/article/view/448.