@phdthesis{Schafferhans2011,
  author      = {Julia Schafferhans},
  title       = {Investigation of defect states in organic semiconductors: Towards long term stable materials for organic photovoltaics},
  type        = {doctoralthesis},
  school      = {Universit{\"a}t W{\"u}rzburg},
  year        = {2011},
}