1. Report of the Quality Standards Subcommittee of the American Academy of Neurology (1994) Practice parameter: the utility of neuroimaging in the evaluation of headache in patients with normal neurologic examinations (summary statement). Neurology 44:1353–1354
2. American Headache Society (2016) Worrisome headache red flags – „SNOOP“. https://americanheadachesociety.org/wpcontent/uploads/2016/07/Primary_or_Secondary_Headache.pdf . Zugegriffen: 13. Mai 2017
3. AWMF S1-Leitlinie „Kopfschmerzen, Diagnostik und apparative Zusatzuntersuchungen“ der Deutschen Gesellschaft für Neurologie, Stand 30.09.2012, Gültigkeit der Leitlinie am 29. Okt. 2015 verlängert bis 29. Sept. 2017
4. Dodick DW (2003) Clinical clues and clinical rules: primary vs. secondary headache. Adv Stud Med 3:S550–S555
5. Frishberg B, Rosenberg J, Matchar D et al (2002) Evidence-based guidelines in the primary care setting: neuroimaging in patients with non acute headache. http://www.aan.com/professionals/practice/guideline/index.cfm . Zugegriffen: 12. Mai 2017