TY  - RPRT
TI  - Order parameter to characterize valence-bond-solid states in quantum spin chains.
AU  - Masaaki Nakamura
AU  - Synge Todo
PY  - 2002
DO  - 10.1103/physrevlett.89.077204
UR  - https://pubmed.ncbi.nlm.nih.gov/12190554/
ID  - 12190554
ER  -