@PhdThesis{steger:98,
  author =       "Carsten Steger",
  title =        "Unbiased Extraction of Curvilinear Structures from
                  2D and 3D Images",
  school =       "Fakult{\"a}t f{\"u}r Informatik, Technische
                  Universit{\"a}t M{\"u}nchen",
  year =         "1998",
  type =         "Dissertation",
  note =         "Herbert Utz Verlag, M{\"u}nchen, ISBN 3-89675-346-0",
}