TY  - RPRT
TI  - The friction cost method: a comment.
AU  - M Johannesson
AU  - G Karlsson
PY  - 1997
DO  - 10.1016/s0167-6296(97)00006-4
UR  - https://pubmed.ncbi.nlm.nih.gov/10173080/
ID  - 10173080
ER  -