Bini, A., P. Castellini, A. Evangelista, and F. Evaristi, et al. 2009. “Evaluation of the Patterns of Diagnostic and Therapeutic Care for Firstreferrals at the Parma Headache Centre”. Acta Biomedica Atenei Parmensis 80 (3): 207-18. https://mattioli1885journals.com/index.php/actabiomedica/article/view/1173.