TY  - RPRT
TI  - Two-dimensional quantum spin Hamiltonians: Spectral properties.
AU  - van Ede van der Pals P
AU  - P Gaspard
PY  - 1994
DO  - 10.1103/physreve.49.79
UR  - https://pubmed.ncbi.nlm.nih.gov/9961193/
ID  - 9961193
ER  -