TY  - RPRT
TI  - Primary yawning headache.
AU  - D E Jacome
PY  - 2001
DO  - 10.1046/j.1468-2982.2001.00223.x
UR  - https://pubmed.ncbi.nlm.nih.gov/11531903/
ID  - 11531903
ER  -