@phdthesis{Hoepfner2012,
  author      = {Philipp Alexander H{\"o}pfner},
  title       = {Two-Dimensional Electron Systems at Surfaces — Spin-Orbit Interaction and Electronic Correlations},
  type        = {doctoralthesis},
  school      = {Universit{\"a}t W{\"u}rzburg},
  year        = {2012},
}