@phdthesis(Schaefer:07,
  author  = {Ulrich Sch{\"a}fer},
  title   = {Integrating Deep and Shallow Natural Language Processing Components -- Representations and Hybrid Architectures},
  school = {Faculty of Mathematics and Computer Science, Saarland University},
  note = {Doctoral Dissertation; also available as Vol. 22 of the Saarbr{\"u}cken Dissertations in Computational Linguistics and Language Technology series (http://www.dfki.de/lt/diss), ISBN 978-3-933218-21-6},
  address = {Saarbr{\"u}cken, Germany},
  url = {http://www.dfki.de/\~{ }uschaefer/diss/},
  year = 2007
  )