TY  - RPRT
TI  - Spin-adapted reduced Hamiltonian. I. Elementary excitations.
AU  - C Valdemoro
PY  - 1985
DO  - 10.1103/physreva.31.2114
UR  - https://pubmed.ncbi.nlm.nih.gov/9895739/
ID  - 9895739
ER  -