@COMMENT{Imported form SteinLib http://elib.zib.de/steinlib}
@UNPUBLISHED{PD00,
   author      = "T. Polzin and S.V. Daneshmand",
   title       = "Improved algorithms for the {Steiner} problem in networks",
   note        = "Preprint, Theoretische Informatik, {Universi\"at} Mannheim",
   year        = "2000",
}