@phdthesis{Wagner2003,
  author      = {Marcus Wagner},
  title       = {An Analysis of the Relationship between Environmental and Economic Performance at the Firm Level and the Influence of Corporate Environmental Strategy Choice},
  type        = {doctoralthesis},
  school      = {Leuphana Universit{\"a}t L{\"u}neburg, Universit{\"a}tsbibliothek der Leuphana Universit{\"a}t L{\"u}neburg},
  year        = {2003},
}