Law, S; Derry, S; Moore, R. A. (2013). »Triptans for acute cluster headache«. The Cochrane database of systematic reviews. 7 (7): CD008042. doi:10.1002/14651858.CD008042.pub3. PMID24353996.
Law, S; Derry, S; Moore, R. A. (2013). »Triptans for acute cluster headache«. The Cochrane database of systematic reviews. 7 (7): CD008042. doi:10.1002/14651858.CD008042.pub3. PMID24353996.