Nummular headache and epicrania fugax: possible association of epicranias in eight patients. Pain Med.

Herrero-Velázquez S, Guerrero AL, Pedraza MI, Mulero P, Ayllón B, Ruiz-Piñero M, Rojo E, Marco J, Fernández-Buey N, Cuadrado ML. Nummular headache and epicrania fugax: possible association of epicranias in eight patients. Pain Med. 2013 Mar;14(3):358-61. doi: 10.1111/pme.12022. PubMed PMID: 23279627.