TY  - RPRT
TI  - Numerical calculation of electron optical aberrations.
AU  - Erwin Kasper
PY  - 2002
DO  - 10.1016/s0304-3991(02)00281-4
UR  - https://pubmed.ncbi.nlm.nih.gov/12492235/
ID  - 12492235
ER  -