TY  - RPRT
TI  - II. Theoretical considerations and methods.
AU  - O Hjalmarson
AU  - T Olsson
AU  - M Riha
PY  - 1974
DO  - 10.1111/j.1651-2227.1974.tb07576.x
UR  - https://pubmed.ncbi.nlm.nih.gov/4533217/
ID  - 4533217
ER  -