@UNPUBLISHED{KraBouTut07,
  AUTHOR =       {N. Kr\"amer and A.-L. Boulesteix and G. Tutz},
  TITLE =        {Penalized Partial Least Squares  with Applications to B-Splines Transformations and Functional Data},
  YEAR =         {2007},
  note = {available at http://ml.cs.tu-berlin.de/~nkraemer/publications.html}
}