6Krymchantewskil AV. Primary headache diagnosis among chronic daily headache patients. Arq Neuro psiquiatr, 2003, 61 : 364 - 367.
7Silberstem SD, Lipton RB, Shwlnskl M. tdlasslhcation of daily and neardaily headaches: field trial of revised IHS criteria. Neurology, 1996, 47 : 871 875.
8Couch JR. Update on chronic daily headache. Curr Treat Options Neurol, 2011, 13 : 41 - 55.
9Lieba-Samal D, Bartl S, Salhofer S, et al. The course of migrainea diary study in unselected patients. Cephalalgia, 2009, 29 :1049 - 1058.
10Holroyd KA, Labus JS, Carlson B. Moderation ana mediation in the psychological and drug treatment of chronic tensiontype headache: the role of disorder severity and psychiatric comorbidity. Pain, 2009, 143 : 213 - 222.