TODOROV, Vasil; STOYANOVA, Vencislava; PEKOVA, Kalina; KALAYDZHIEV, Nikolay; BOGDANOVA, Desislava; MILANOV, Ivan. Headache regisitries – significance and guidance for their development. Cephalgia, [S. l.], v. 26, n. 1, p. 17–23, 2024. Disponível em: https://cephalgia.org/index.php/ce/article/view/68. Acesso em: 14 oct. 2026.