TY  - RPRT
TI  - Variational constraints for electrical-impedance tomography.
AU  - JG Berryman
AU  - RV Kohn
PY  - 1990
DO  - 10.1103/physrevlett.65.325
UR  - https://pubmed.ncbi.nlm.nih.gov/10042890/
ID  - 10042890
ER  -