TY  - RPRT
TI  - Heart rate decrease: a comparison of feedback modalities and biofeedback with other procedures.
AU  - G Pollard
AU  - R Ashton
DO  - 10.1016/0301-0511(82)90005-9
UR  - https://pubmed.ncbi.nlm.nih.gov/7126721/
ID  - 7126721
ER  -