TY  - RPRT
TI  - [Biofeedback in chronic headache: is a learning process in physiologic functional parameters detectable?].
AU  - B Kröner-Herwig
AU  - K W Weich
PY  - 1987
UR  - https://pubmed.ncbi.nlm.nih.gov/3630251/
ID  - 3630251
ER  -