@article{Hartmann2001,
  author    = {Hartmann, J{\"u}rgen},
  title     = {Advanced comparator method for measuring ultra small aperture areas},
  journal   = {Meas.Sci.Techn.},
  number    = {12},
  institution = {Fakult{\"a}t Elektrotechnik},
  pages     = {1678 -- 1682},
  year      = {2001},
  language  = {en}
}