TY  - RPRT
TI  - Czycholl and Qin reply.
AU  - G Czycholl
AU  - Q Qin
PY  - 1992
DO  - 10.1103/physrevlett.69.2879
UR  - https://pubmed.ncbi.nlm.nih.gov/10046615/
ID  - 10046615
ER  -