TY  - RPRT
TI  - Valence excitations in electron microscopy: resolved and unresolved issues.
AU  - A Howie
PY  - 2003
DO  - 10.1016/s0968-4328(03)00022-2
UR  - https://pubmed.ncbi.nlm.nih.gov/12895483/
ID  - 12895483
ER  -