@phdthesis{Thompson2014,
  author      = {Fred Thompson},
  title       = {Investigating the Complexity of the Central Approximant: Articulatory Difficulties of the American \"R\" for L1-German Speakers},
  type        = {doctoralthesis},
  pages       = {XV, 203, 719 Seiten},
  school      = {Universit{\"a}t Koblenz, Universit{\"a}tsbibliothek},
  year        = {2014},
}