@phdthesis{Zuern2015,
  author      = {Michael Z{\"u}rn},
  title       = {The Dual Nature of Utility - Categorical and Comparative Evaluations in Economic Decisions},
  type        = {doctoralthesis},
  school      = {Universit{\"a}t W{\"u}rzburg},
  year        = {2015},
}