TY  - RPRT
TI  - Nonlinear sigma model and static holes.
AU  - K Bitar
AU  - E Manousakis
PY  - 1991
DO  - 10.1103/physrevb.43.2615
UR  - https://pubmed.ncbi.nlm.nih.gov/9997551/
ID  - 9997551
ER  -