TY  - RPRT
TI  - Li, Porter, and Johnson respond.
AU  - L Li
AU  - RN Porter
AU  - PM Johnson
PY  - 1985
DO  - 10.1103/physrevlett.54.367
UR  - https://pubmed.ncbi.nlm.nih.gov/10031495/
ID  - 10031495
ER  -