TY  - RPRT
TI  - Keefer and Schaefer respond.
AU  - KD Keefer
AU  - DW Schaefer
PY  - 1987
DO  - 10.1103/physrevlett.58.1155
UR  - https://pubmed.ncbi.nlm.nih.gov/10034354/
ID  - 10034354
ER  -