@phdthesis{Christoph1987,
  author      = {Rainer Christoph},
  title       = {Zerst{\"o}rungsfreie Pr{\"u}fung der Oberfl{\"a}chenverfestigung.},
  type        = {doctoralthesis},
  pages       = {119 S.: 80 Abb., 10 Tab., Anl.},
  year        = {1987},
}