TY  - RPRT
TI  - Zettl and Kinney reply.
AU  - A Zettl
AU  - J Kinney
PY  - 1988
DO  - 10.1103/physrevlett.60.753
UR  - https://pubmed.ncbi.nlm.nih.gov/10038641/
ID  - 10038641
ER  -