Sampaio, Maria da Conceição Filgueira. “Oculo-Nasal Autonomic Symptoms in Migraine and Cluster Headache (Abstract)”. Headache Medicine 2, no. 4 (December 31, 2011): 218. Accessed April 25, 2024. https://headachemedicine.com.br/index.php/hm/article/view/197.