TY  - RPRT
TI  - Bargmann's theorem and position-dependent effective mass.
AU  - K Kawamura
AU  - RA Brown
PY  - 1988
DO  - 10.1103/physrevb.37.3932
UR  - https://pubmed.ncbi.nlm.nih.gov/9945023/
ID  - 9945023
ER  -