@article{HennigD2007,
  title = {Point-spread functions for backscattered imaging in the scanning electron microscope },
  author = {Hennig, P. and Denk, W.},
  journal = {Journal of Applied Physics },
  volume = {102},
  number = {12},
  pages = {1-8},
  month = dec,
  year = {2007},
  month_numeric = {12}
}