@unpublished{Laeuter2011,
  author  = {Henning L{\"a}uter},
  title   = {Estimation in partly parametric additive Cox models},
  institution = {Institut f{\"u}r Mathematik},
  series    = {Mathematische Statistik und Wahrscheinlichkeitstheorie : Preprint},
  number    = {2003, 16},
  year    = {2011},
}