@unpublished{GuelerHamacher2007,
  author  = {Cigdem G{\"u}ler and Horst Hamacher},
  title   = {Capacity Inverse Minimum Cost Flow Problem},
  institution = {Fachbereich Mathematik},
  series    = {Report in Wirtschaftsmathematik (WIMA Report)},
  number    = {111},
  year    = {2007}
}