Raimundo Pereira Silva-Néto, Patrick Emanuell Mesquita Sousa Santos, Mario Fernando Prieto Peres: Hypnic headache: A review of 348 cases published from 1988 to 2018. In: Journal of the Neurological Sciences. Band401, 2019, S.103–109, doi:10.1016/j.jns.2019.04.028, PMID 31075680.
Raimundo Pereira Silva-Néto, Patrick Emanuell Mesquita Sousa Santos, Mario Fernando Prieto Peres: Hypnic headache: A review of 348 cases published from 1988 to 2018. In: Journal of the Neurological Sciences. Band401, 2019, S.103–109, doi:10.1016/j.jns.2019.04.028, PMID 31075680.