@misc{indiciaea104e133b67a,
  title = {Numerical calculation of electron optical aberrations.},
  author = {Erwin Kasper},
  year = {2002},
  doi = {10.1016/s0304-3991(02)00281-4},
  url = {https://pubmed.ncbi.nlm.nih.gov/12492235/},
  note = {Source identifier: 12492235}
}